一年级口算题：20以内的填括号

()+14=20()-17=311-()=714+()=2018-()=11()-8=9()+5=1310-()=3()-8=12()+6=1911+()=1515+()=18()-13=418-()=121+()=42+()=819-()=14()+6=16()+3=1416+()=1610+()=1420-()=416-()=1219-()=7()-11=5()-3=16()-8=57-()=410+()=19()+5=16()-15=5()+7=20()-6=10()-14=612+()=136+()=18()-1=1114+()=17()+5=208+()=16()-10=719-()=1115-()=89+()=197+()=166+()=11()-12=57+()=1317-()=819-()=9()+5=18()-11=1()-3=3()-19=110+()=1314-()=12()-1=1()+6=15()+10=17()-15=420-()=8()+15=1514+()=1412-()=215-()=712+()=1910-()=213-()=4()-10=518-()=13()+8=20()-6=2()+3=919-()=618-()=14()+2=16()-6=121+()=15()-9=6()-3=212+()=18()-9=1()+14=20()-16=2()-15=56+()=1315+()=208+()=117+()=178+()=1212-()=1()-4=216-()=2()-9=11()-8=24+()=8()+16=17()-12=4()+8=100+()=18

用时：得分：口算天天练

20以内加减填括号4+()=10()+14=17()+11=11()+9=20()-11=87-()=4()+6=15()-13=111+()=15()-14=1()-3=1718-()=5()-7=314-()=25-()-3()-1=6()+11=164+()=1910+()=109+()=144+()=1114-()=6()+11=1817+()=19()-16=119-()=1212-()=2()-6=5()-7=1018-()=1213-()=520-()=15()-9=314-()=38+()=1315-()=716-()=1()+13=1919-()=1()-5=11()+10=15()-4=3()+2=10()+18=20()+4=7()-4=47+()=14()+8=178+()=2017-()=911-()=7()-10=419-()=106-()=3()-17=36+()=1112-()=617-()=8()-7=1()-10=7()+6=83+()=5()+5=612-()=5()+8=8()-2=16()+10=200+()=55+()=7()+14=20()-19=17-()=4()-8=318-()=12()-4=515-()=107+()=1611+()=18()+6=15()-5=1320-()=4()+11=1714-()=518-()=157+()=1310+()=18()-2=174-()=113-()=312-()=9()+1=16()+11=14()+10=18()-14=58+()=146+()=11()-15=5()+10=179+()=18()-5=11

20以内加减法口算练习题填空型时间：错误率：( )+9=10 ()-13=5 ( )+3=17 ( )+12=14 ()÷3=11 ( )+4=119÷( )=10 ()-5=7 16-( )=9 4÷( )=16 3÷( )=17 3+ ()=8()+7=13 10-( )=8 5÷( )=20 ( )+8=11 ( )+7=16 15+( )=20 () -6=7 ()+3=6 9÷( )=14 2÷( )二3 16-( )=2 ( )-2=09-( )=2 15-( )=3 4-( )=3 18-( )=10 ( )+16=19 （：1+16=17 12÷( )=16 13-( )=11 2÷( )=11( )+8=10 16-( )=11 17-( )=7 8-( )=2 ( )+10=19 ( )-4=211+( )=17 ( )+2=14 ( )+6=820-( )二9 9-( )=7 8÷( )=18 ()- 13=4 5÷( )=17 ( )-9=711-( )二4 ( )+3=16 ( )+7=10 3÷( )=18 19-( )=1 4÷( )=11 5÷( )二8 4+( )=12 ( )+2=59-( )二4 ()-1=5 2÷( )=1911-( )二8 ()-4=8 20-( )=12 1÷( )=18 4-( )二1 ( )+3=14 ( )+2=19 19-( )二4 ()■-15=5 10-( )=7( )+1=14 7+( )=15 7-( )=0 ()÷1=5 10-( )二617-( )二5 ()-6=5 20-( )二3 ( )-1二7 16+( )=17 ()■-14=5 () -17=0 11-( )=10 () -18=016-( )=0 9-( )二8 5+( )二9 ( )+8=9 10-( )二2 12+( )二13()÷2=13 ( )+8=16 5÷( )=16 13-( )二9 4÷( )=18 ()+5=1317-( )二9 ()-6=10 18-( )二7 ( )+8=14 7+( )=12 ()+5=1515-( )二8 ()+7=12 15-( )二4 10+( )=14 ()-16=1 5÷( )=11 ( )+1=9 7÷( )=10 ()- 13=1 6-( )二3 14-( )二0 ()- 5二1220-( )二7 6÷( )二8 () -2=13 ()■-2=16 () -10=5 4-( )=0 ()- -2=12 ( )-8二4 11-( )二6 ()■-17=1 6÷( )=19 () -13=3 ( )+4=20 ( )+5=10 () -15=113-( )二2 8÷( )=12 20-( )=13 ()- -2=18 9-( )二6 8-( )二517-( )=11 13-( )二8 ( )+2=9()+2=11 16-( )二13 7÷()二13()■-15=2 ( )-5=0 ( )+3=9 ( )+4=18 18-( )=11 ( )+2=73÷( )二4 ( )+10=11 ()÷2=12 19-( )二3 ( )+5=9 ()÷5=17( )+10=16 10-( )二3 15-( )=2 12-( )二5 8-( )=1 1+( )=3 19-( )二6 13-( )二5 () -11=5 18-( )二8 13+( )=20 14-( )=8 ()■-3=15 20-( )=2 2÷( )=16 10+( )=19 ( )-3=2 1+( )=139÷( )=15 4÷( )=17 10-( )二4 () -5二2 15÷( )二19 3÷( )二7 ()- 14=4 ( )+11=18 ( )+14=19 ( )+13=18 1+( )=16 6÷( )=20 1÷( )=2 12-( )=11 ( )-11=011+( )=12 6÷( )=10 3÷( )=20( )+9=16 18-( )二6 ( )+3=13 ()- 1=13 12+( )=15 ()-6=9()- 1=16 ( )-4=10 9÷( )二1211+( )=20 ( )-19=1 ( )-14=6()+1=7 ( )+6=10 2÷( )二18 1÷( )二7()+7=9 4÷( )=20 ()- 6=14 8-( )二4 ()÷5=11()- 1=18 ( )+13=14 ( )+18=20 () -4二7 ()-9=9 ()+5=610+( )二17 15-( )=0 ( )+7=19 () -7=7 13-( )二3 5+( )=1315÷( )=18 9-( )二5 2÷( )二5 ()- 14=3 ()-9=1 5-( )二44÷( )=15 ()- 5=13 ( )+11=20 11-( )二3 ()- 1=15 ( )+12=187÷( )二8 4÷( )=13 3÷( )=13 18-( )二3 15-( )=7 7÷( )二17 ( )+14=15 16-( )二12 ( )-1=19 14-( )二2 15-( )=6 ( )-10=6 ( )+3=20 ( )+9=17 ()-1=96-( )=1 9÷( )=18 1+( )二12 ()- 3=10 () -1=6 ( )+6=18 18-( )二2 11-( )二9 ()-2=2()- 3=12 10+( )=11 8÷( )=14 ()- 9=10 13+( )=18 1÷( )=20 ()- 1=17 ()- 4=13 ()-3=17()- 20=0 14-( )二4 1÷( )二8 12-( )=1 15-( )=11 8-( )=0 () -5二9 ()- 12=1 ( )+10=15 () -6=0 ( )+8=19 4÷( )二14 20-( )=15 () -7=6 15-( )=1 6-( )二4 () -8=6 ( )+18=19()-3=11 () -5=10 15-( )=14()-6=12 12-( )=3 9-( )=1 ()+3=4 () -16=4 ()-17=2()-2=17 ()÷7=15 ()-5=314-( )=5 2÷( )=12 ( )+13=15 ( )÷12=19 ( )-4=1 ()÷2=17()-9=2 9-( )=0 19-( )=14( )+11=19 2÷( )二17 8+( )=20 ( )-12=0 ( )-1=1 12-( )=217+( )=18 ( )+3=7 3+( )=16 ()-ι=o3÷( )二15 16-( )=8( )+8=20 14+( )=16 ( )-4=14 12-( )=6 () -13=0 18+( )=19()-2=6 ( )+7=14 17-( )=8 14+( )=19 () -12=7 ()-6=319+( )=20 1÷( )二5 3-( )=1 7-( )=3 () -11=6 ()-2=5()-3=16 () -11=8 10+( )=16 ()-2=3 () -10=0 ( )+11=1312-( )=10 ( )÷2=18 ()+1=619-( )=0 ()-2=14 7+( )=20 ( )+6=19 ()-6=1 10-( )=5 11+( )=16 ()-7=10 16-( )=4 9+( )=17 ()÷5=7 20-( )=16 ()-1=12 ( )+1=16 7-( )=4 4+( )=6 8+( )=10 19-( )=13 20-( )=8 13-( )=4 ( )+10=20 20-( )=11 ()-H=3 3÷( )=9 14+( )=20 3+( )=14 ()÷2=1519-( )=9 20-( )=10 ()-7=12( )+8=18 17-( )=15 ( )+4=6 ( )+6=12 ( )+4=13 2÷( )二4 3÷( )=12 19-( )=11 ()+1=156+( )=15 11-()=1 13+( )=17 ( )+3=19 3-( )=2 4÷( )二8 3-( )=0 ( )+4=15 ( )+11=17 ( )+2=20 ( )+15=19 ()-3=917-( )=14 11+( )=18 19-( )=15( )+9=14 1+( )=10 ()-13=514+( )=17 2÷( )=14 ()÷3=117÷( )=11 ( )+1=10 ()-5=716-( )=9 4÷( )=16 ( )+14=17 3÷( )二8 ()÷7=13 10-( )=8 ( )+15=20 ( )+8-11 ( )+7=1615+( )=20 13-( )二73÷( )=6 9+( )=14 ( )+1=3 ()-14=2()-2=0 9-( )二2 ()-12=3()-1=3 18-( )=10 ( )+16=19( )+16=17 12÷( )=16 13-( )=112÷( )=11 2÷( )=10 16-( )=11 ()-10=7 ( )-6二2 ( )+10=19()-4=2 11+( )=17 ( )+2=142÷( )二8 () -11=9 9-( )=7( )+10=18 17-( )二4 5÷( )=17 ()-9=7 ( )-7=4 ( )+3=163+( )=10 3÷( )=18 19-( )=1 ()+7=11 5+( )二8 ( )+8=123÷( )二5 9-( )二4 6-( )二52÷( )=19 11-( )二8 12-( )二820-( )二12 ( )+17=18 4-( )二1( )+3=14 17÷( )=19 ()■15=4 20-( )二5 ()-3=7 ( )+1=147÷( )=15 7-( )=0 4÷( )二5 () -4=6 ()-12=5 () -6=5()- 17=3 ()-1=7 16+( )二1719-( )二5 ()-17=0 ()- 1=1018-( )=0 ( )-16=0 () -1=85÷( )二9 ()+8=9 () -8=212÷( )二13 11+( )=13 8÷( )=16( )+11=16 ()-4=9 ( )+14=18 8÷( )=13 ()-8=9 ()- 6=1018-( )=7( )+8=14 7+( )二12 ()+5=15 15-( )二8 ()+7=12()- 11=4 10+( )=14 17-( )二15+( )=11 8÷( )二9 ( )+3=10()- 13=1 ()-3=3 14-( )=0() -5二12 ()■-13=7 6÷( )二8 15-( )二13 ()-2=16 () -10=54-( )=0 14-( )=12 12-( )二4 11-( )二6 ()--17=1 6÷( )=19 ()-13=3 (卜卜4二20 5÷( )=10 ()-15=1 13-( )=2 () +4=12 ()-7=13 ()■-2=18 9-( )二6 8-( )二5 ()-6=11 13-( ):8 7÷( )二9 9÷( )=11 16-( )=137÷( )二13 17-()=2 5-( )=0 ()+3=9 ()-»-4≡1818-( )=11()+2=7 3÷( )二4 ()÷ 10=11()+2=12 19-( )=3 ( )÷5=9()+5=17 6÷( )=16 10-( )=315-( )二2 12-( )二5 8-( )=11÷( )二3 19-( )二6 13-( ):5()-11=5 18-( )二8 () +7=20()-6=8 ()-3=15 20-( )二2 (卜-14=16 10+( )=19 ( )-3=21÷( )二13 ( )+6=15 (八-13=17 ( )-6=4 7-( )=2 () +4=19 3÷( )二7 18-( )=4 ()+ 11=18 (八F14=19 5+( )=18 1÷( )=16 (八F14=20 ()÷1=2 12-( )=11 11-( )=0 ()+1=12 () +4=10 3÷( )=20 ( )+9=16 () -12=6 10+( )二13 ()-1=13 () +3=15 ( )-6二9 ()-1=16 () -4=10 9÷( )二12 ( )+9=20 20-( )=1 () -14=6 6÷( )=7 4÷( )=10 2÷( )=18 1÷( )=7 ( )+7=94÷( )=20 20-( )=14 8-( )二4 6÷( )=11 ( )-1=18 1÷( )=14(八F18=20 ()-4=7 18-( )二91÷( )二6 ()÷7=17 15-( )=012÷( )=19 14-( )=7 () -10=35+( )二13 15+( )=18 ( )-4=5( )+3=5 ()-14=3 10-( )=15-( )二4 4÷( )=15 ()- 5=139÷( )=20 () -8=3 ()- 1=15 6÷( )=18 7÷( )二8 4÷( )=133÷( )=13 18-( )=3 15-( )=7 ( )+10=17 1÷( )=15 ()- 4=1220-( )=19 ()- 12=2 15-( )二616-( )二6 ( )+3=20 8÷( )=17 ()-1=9 () -5=1 9÷( )=18 ( )+11=12 13-( )=10 () -1=6 ( )+6=18 ()- 16=2 () -2=9 ()-2=2()- 3=12 10+( )=11( )+6=14 19-( )=10 13÷( )=18 ( )+19=20 ()- 1=17 17-( )=1320-( )二17 ()- 20=0 ()- 10=41÷( )二8 12-( )=1 15-( )=11()-8=014-( )=9 ()- 12=1( )+10=15 6-( )=0 ( )+8=19 ( )+10=14 ()- 5=15 () -7二6()-14=1 () -2=4 () -8=6( )+18=19 14-( )=11 15-( )=1015-( )=14 18-( )=12 ()-9=39-( )=1 1÷( )二4 20-( )=4()-17=2 ()- 2=17 ()+7=158-( )=3 14-( )二5 ( )+10=122÷( )=15 7÷( )=19 5-( )=1 15+( )=17 11-( )=2 9-( )=0()-5=14 ( )+11=19 ( )+15=17 ( )÷12=20 ()- 12=0 ()-1=112-( )=2 ( )+1=18 ()÷3=7 ( )+13=16 1-( )=0 3÷( )=1516-( )=8 ( )+8=20 14+( )=16 18-( )=14 () -6=6 13-( )=0 ( )+1=19 () -2=6 ( )+7=14()-9=8 14+( )=19 ()-12=79-( )=3 19+( )=20 ()+4=5()-2=1 7-( )二3 ()-11=67-( )=5 19-( )=16 19-( )=8 ( )+6=16 5-()=3 ( )-10=02÷( )=13 ()-2=10 ( )+2=18 5÷( )二6 19-( )=0 16-( )=14 7+( )=20 ( )+6=19 7-( )=1 10-( )=5 ( )+5=16 ()-7二1016-( )=4 ( )+8=17 ()÷5=720-( )=16 ()-1=12 ( )+1=16 7-( )=4 4+( )=6 ( )+2=10 ()-6=13 20-( )=8 13-( )=4 ( )+10=20 ( )-9=11 14-( )=3 ( )÷6=9 ( )+6=20 3+( )=14 13+( )=15 19-( )=9 ( )-10=10 ()-7=12 ( )+8=18 ()-2=152÷( )二6 6+( )=12 9+( )=13 2÷( )二4 ( )+9=12 ( )-8=11 14+( )=15 6+( )=15 ( )-10=1 ( )+4=17 ( )+3=19 ()-1=2()+4=8 3-( )=0 11+( )=15 ( )+11=17 18+( )=20 ( )+15=19 ()-3=9 ()-3=14 11+( )=1819-( )=15 18-( )=58+()=11()-5=7 3÷( )=17 10-( )=8 ( )+7=16 ()÷3=6()-14=2()-12=3( )+16=19 13-( )=11 16-( )=11 ( )+10=19 12+( )=14 ()-2=75+( )=17 ( )+3=16 ( )-18≡15+()=14()+3=1 7( )+4=1116-( )=9 3÷( )二8 ( )+15=2015+()=209+()=142-( )=04-( )=31÷( )=17( )+9=1117-( )=7()-4=22÷()二8( )+10=1816-( )=73+( )=104+( )=11错误率：1+( )=102+( )=149+( )=10( )+12=16()+7=13( )+8=11()-6=72÷( )二39-( )=2( )-8-1012+( )=16( )+8=108-( )=2( )+6=1720-( )=9()-13=4()-7=4( )+15=185+( )=8( )+8=12 ()÷2=5 9-( )=4 ()-1=5 2÷( )=19 11-( )二8 ()-4=8 ( )-8=12 1+( )=18 4-( )二1 ( )+3=14 ( )+2=19 19-( )二4 20-( )二5 ( )-3=7( )+1=14 7+( )=15 7-( )=0 ()+1=5 10-( )二6 () -12=5()-6=5 ()-17=3 8-( )=7 ()+1=17 ()-14=5 17-( )=0( )-1=10 18-( )=0 16-( )=0 9-( )二8 5÷( )二9 1÷( )二9 ()-8=2 ()÷1=13 11+( )=13 8÷( )=16 ( )+11=16 ( )-4=9 ( )+14=18 ( )+5=13 17-( )二9 ( )-6=10 ()-H=7 ( )+8=147÷( )二12 10+( )=15 ( )-7=85÷( )=12 15-( )二4 ( )+4=14 ()-眸1 ( )+6=11 8÷( )二9 7÷( )=10 14-( )=1 6-( )二314-( )=0 17-( )二12 ()■13=7 6÷( )=8 () -2=13 18-( )=1615-( )二5 4-( )=0 14-( )=12 () -8=4 11-( )=6 18-()=1 ()+：13=19 16-( )二3 (卜-4二20 ()+ 5=10 16-( )=1 ()-11=2 ()+ 4=12 20-( )二13 20-( )=18 () -3=6 8-( )二5 ()-6=11 () -5=8 7÷( )二9 9÷( )=11 16-( )二13 7÷( )二13 17-( )二2 () -5=0 ( )+3=9 14+( )=18 ()- 7=11 5÷( )=7 3÷( )二4 1÷( )=11 () +2=12 ()-16=3 4÷( )二9 () +5=17 ()+：10=16 10-( )二3 15-( )=2 ()-7=5 () -7=1 1÷( )=3 19-( )二6 13-( )二5 16-( )二5 ()-10=8 ()+ 7=20 14-( )二8 18-( )=15 20-( )二2 ()-»-14=16 (卜-9=19() -3=2 1+( )=13 () +6=154÷( )二17 10-( )二4 7-( )=2 15÷( )=19 ( )+4=7 18-( )二4()+：11=I8 5÷( )=19 5÷( )=18 1÷( )=16 ()一-14=20 1+( )二2 ()- 1=11 () -11=0 11+( )=12 6÷( )=10 3÷( )=20 () +9=16 18-( )二6 ()+3=13 14-( )二13 ()÷ 3二15 15-( )二9 17-( )=16 14-( )=10 9÷( )二12 11+( )=20 ()- 19=1 20-( )二6 6÷( )二7 4÷( )=10 (H -16=18 1÷( )=7 2÷( )二9 ()+ 16=20 () -6=14 8-( )=4 6÷( )=11 19-( )=18 1÷( )=14 2÷( )=20 ( )-4=7 () -9=9 1÷( )=6 10+( )二17 ()- 15=0 12+( )=19 14-( )二7()- 10=3 5÷( )=13 () +3=18() -4=5 2÷( )二5 () -14=3() -9=1 ()-1=4 ( )+11=15()- 5=13 ( )+11=20 ()-8=316-( )=15 6÷( )=18 ()÷1=84÷( )=13 ( )+10=13 18-( )=3 15-( )二7 ( )+10=17 ( )+14=15 16-( )=12 ( )-1=19 14-( )二2 15-( )=6 ( )-10=6 ( )+3=208÷( )=17 10-( )二9 ()-5=19÷( )=18 ( )+11=12 13-( )=107-( )=6 12÷( )二18 ()-16=211-( )二9 ()-2=2 ()-3=1210+( )=11 ( )+6=14 19-( )=10 ( )+5=18 ( )+19=20 18-( )=1717-( )二13 ()-3=17 ( )-20=0 ()- 10=4 ()÷7=8 12-( )=115-( )=11 ()-8=0 14-( )二9 13-( )=1 5÷( )=15 6-( )=0( )+8=19 4÷( )=14 ()-5=15() -7=6 15-( )=1 ()-2=420以内加减法口算练习题填空型时间：错误率•()-8=6 1+( )=19 14-( )=1115-( )=10 15-( )=14 18-( )=12 12-( )=3 ()-8=1 1+( )=4( )-16=4 19-( )=2 19-( )二17 8+( )=15 8-( )=3 14-( )二52÷( )=12 ( )+13=15 ( )+12=19 ()-4=1 ()÷2=17 () -9=29-( )=0 ()-5=14 8÷( )=19 ( )+15=17 ( )+12=20 ()-12=0 ()-1=1 12-( )=2 ( )+1=18 ()÷3=7 ( )+13=16 1-( )=0 ( )+12=15 ()-8=8 12+( )=20 14+( )=16 ( )-4=14 12-( )二6 ()-13=0 ( )+1=19 8-( )二6 ( )+7=14 17-( )=8 14+( )=1919-( )=7 ()-6=3 ( )+1=201÷( )二5 3-( )=1 () -4=317-( )=6 7-( )=5 19-( )=16 19-( )=8 ( )+6=16 ()23()- 10=0 2÷( )=13 12-( )=1016+( )=18 5+( )二6 ( )-19=016-( )=14 ( )+13=20 13+( )=19 () -6=1 ()-5=5 ( )+5=1617-( )=10 ()-12=4 ( )+8=172÷( )二7 20-( )=16 13-( )=12 15÷( )=16 7-( )二4 4÷( )二68÷( )=10 ()-6=13 ()-12=8() -9二4 ( )+10=20 ( )-9=11 ()- 11=3 3÷( )二9 ( )+6=203÷( )=14 13+( )=15 ( )-10=920-( )=10 ()-7=12 10+( )=18 17-( )=15 2÷( )二6 6÷( )=12 ( )+4=13 ()÷2=4 ( )+9=12 ()- 8=11 14+( )=15 ( )+9=15 11-( )=1 ( )+4=17 ( )+3=19 () -1=2()+4=8 ()-3=0 ( )+4=15 ( )+11=17 ( )+2=20 ( )+15=19 ()-3=9 17-( )=1411+( )=18 () -4=15 ( )+9=14( )+9=10 () -13=5 ()÷3=17 ( )÷12=14 8÷( )=11 7÷( )=11 ( )+1=10 12-( )=7 16-( )二9 4÷( )=16 3÷( )=17 3÷( )二86÷( )=13 10-( )=8 ( )+15=20 3÷( )=11 9÷( )=16 15+( )=2013-( )二7( )+3=6 9÷( )=14()+1=3 16-( )=2 2-( )=0 9-( )二2 () -12=3 4-( )二3 ( )-8=10 ( )+16=19 1÷( )=17 ( )+4=16 13-( )=11 ( )+9=11 ( )+8=10 16-( )=11 17-( )二7 ()-6=2 9÷( )=19 ()-4=2 ( )+6=17 12+( )=14 2÷( )二8 ( )-11=9 ( )-2=7 8÷( )=18 17-( )=4 5÷( )=17 ()-9=7()-7=4 13+( )=16 ( )+7=10 3÷( )=18 19-( )=1 4÷( )=115÷( )二8 4÷( )=12 3÷( )二5 () -5=4 () -1=5 ( )+17=19 () -3二8 12-()=8 ()- 8=12 ( )+17=18 4-( )=1 11+( )=14 ∏÷()=19 19-( )二4 20-( )二5 () -3=7 13+( )=14 ( )+8=157-( )=0 ()÷1=5 () -4=6 ()- 12=5 () -6=5 ()- 17=3 () -1=7 16+( )=17 ()- 14=5 ()- 17=0 ()- 1=10 ()- 18=0 16-( )=0 () -1=8 5÷( )二9()+8=9 10-( )=2 ()÷1=1311+( )=13 ( )÷8≡165÷( )=16 13-( )二9 4÷( )=18 ()÷5=1317-( )二9 16-( )=10 18-( )二76÷( )=14 7÷( )=12 10+( )=15 () -7=8 5÷( )=12 15-( )二410+( )=14 ()- 16=1 5÷( )=118÷( )二9 7÷( )=10 14-( )二1( )-3二3 14 -( )=0 17-( )二12 () -13=7 6 ÷( )=8 () -2=13 18-( )=16 15 -( )二5 ( )-4=0 () -2=12 ( ) -8二4 11-( )二6 () -17=1 6+ ( )=19 () -13=3 16+( )=20 ( )+ 5=10 16-( )二1 13-( )二2 ( )÷ 4=12 20-( )二1320-( )=18 ( ) -3二6 ( )-3二5 () -6=11 13 -( )=8 ( )÷2=9 () +2=11 ( )- 3=13 7÷( )=13 17-( )二2 5 -( )=0 ( )+3=9 14+( )=18 ( )- 7=11 5÷( )二7 ( )+1=4 1+ ( )=11 () +2=12 19-( )二3 ( ) +5=9 () +5=17 6÷( )=16 10 -( )=3 () -13=2 12-( )二5 ( ) -7=1 1÷( )二3 () -13=6 13 -( )二5 16-( )二5 18-( )二8 13-F ( )=20 ( )-6=8 18-( )二15 20 -( )=2 2÷( )=16( )+9=19 () -3二2 1÷( )=139÷( )二15 4÷( )=17 10-( )=4 ( )-5二2 15÷( )=19 ()÷4=7( )-14=4 7+( )=18 ( )+14=19() +13=18 ()+：15=16 6+( )=201+ ()二2 ()- 1=11 ( )-11=011+( )二12 (H -4=10 3+( )=207÷( )=16 18-( )=6 10+( )=13 14-( )二13 (H -3=15 ()-6=9( )-1=16 ()- 4二10 ()÷3=12( )+9=20 20-( )=1 20-( )=6( )+1=7 4÷( )=10 2+( )=18( )+6=7 2÷( )二9 4+( )=2020-( )=14 8-( )二4 ()÷5=11 ( )-1=18 1+( )=14 ( )+18=2011- ()二7 18-( )二9 1÷( )二610+( )二17 ()- 15=0 12+( )=19( )-7二7 13-( )二3 5+( )=13( )+3=18 () -4=5 ()+3=5() -14=3 () -9=1 ()-1=4( )+11=15 18-( )二13 ( )+11=2011-( )二3 ()- 1=15 6÷( )=18( )+1=8 4÷( )=13 3÷( )二1318-( )二3 15-( )二7 ( )+10=171÷( )二15 ()- 4=12 20-( )=1914-( )二2 15-( )二6 ( )-10=6∏÷()=20 8÷( )二17 ()-1=9( )-5=1 9÷( )=18 1+( )二12() -3=10 7-( )=6 ( )+6=18() -16=2 11-( )二9 ()-2=2() -3=12 10+( )=11 ( )+6=1419-( )=10 ( )÷5=18 ( )+19=20 18-( )=17 ()- 4二13 ()-3=1720-( )=0 14-( )二4 ()÷7=812-( )=1 ()- 4二11 ()-8=014-( )二9 ()- 12=1 ( )+10=156-( )=0 11+( )=19 ( )+10=14() -5=15 () -7=615-( )二16-( )二4 14-( )二6 1+( )=19() -3=11 15-( )=10 ()■-1=14 18-( )二12 ()-9=3 9-( )=1 ( )÷3=4 ( )-16=4 19-( )二2 () -2=17 ()+7=15 8-( )二3 14-( )二5 2÷( )二12 2÷( )=15( )÷12=19 ()-4=1 ()÷2=17 ( )-9=2 ()-9=0 ()- 5=148÷( )=19 ( )+15=17 8÷( )=20 12-( )=0 ()-1=1 12-( )二2 ∏÷()=18 ()÷3=7 ( )+13=16 1-( )=0 3÷( )二15 16-( )二8 12÷( )=20 14+( )=16 ()■-4=14 ( )-6=6 13-( )=0 18+( )=19 8-( )二6 7÷( )二14 17-( )二8 ( )+5=19 ()-12=7 9-( )二3 ( )+1=20 ()+4=5 3-( )=1 7-( )二3 ()-11=6 () -2=5 19-( )=16 19-( )二8 ( )+6=165-( )二3 10-( )二0 ( )+11=13 ()■-2=10 16+( )=18 ()÷1=6()- -19=0 ()-2=14 7+( )=20( )+6=19 ()-6=1 ()-5=511+( )=16 17-( )=10 ()-12=4( )+8=17 ()÷5=7 20-( )=16 ()- -1=12 15+( )=16 7-( )二44÷( )二6 8÷( )=10 ()-6=1320-( )二8 13-( )二4 ( )+10=20 20-( )=11 ()-H=3 3÷( )二914+( )=20 ( )+11=14 13+( )=15 19-( )二9 20-( )=10 19-( )=12 10+( )=18 ()-2=15 ( )+4=6 ( )+6=12 ( )+4=13 2÷( )二4 3÷( )=12 ( )-8=11 ()+1=15 ( )+9=15 ( )-10=1 13+( )=1716+( )=19 3-( )二2 4÷( )二8 3-( )二0 11+( )=15 ( )+11=17( )+2=20 ( )+15=19 ()-3=917-( )=14 11+( )=18 ()-4=155+( )=14 ( )+9=10 18-( )二5()+3=17 ( )+12=14 ()÷3=117÷( )=11 ( )+1=10 ()-5=716-( )二9 ( )+12=16 3÷( )=17 ( )+5=8 6÷( )二13 ()-2二85÷( )=20 3÷( )=11 ( )+7=1615÷( )=20 ()-6=7 ()÷3=6( )+5=14 2÷( )二3 ()-14=22-( )=0 9-( )二2 ()-12=34-( )二3 18-( )=10 3÷( )=19 1÷( )二17 ( )+4=16 ()-2=112÷( )=11 2÷( )=10 ()-5=1117-( )二7 8-( )二2 9÷( )二19 ( )-4二2 ( )+6=17 ( )+2=142÷( )二8 20-( )二9 9-( )=7 ( )+10=18 17-( )二4 5÷( )=17 16-( )二7 ()-7=4 13÷( )=16 ( )+7=10 ( )+15=18 ( )-18=14+( )=11 ()+3=8 4+( )=12 ()÷2=5 9-( )=4 ()-1=52+( )=19 ()-3=8 12-( )=8 20-( )=12 1+( )=18 4-( )=1 11+( )=14 ( )÷2=19 19-( )=4 20-( )=5 10-( )=7 ( )+1=14 ( )+8=15 ()-7=0 ()+1=510-( )=6 ()-12=5 ()-6=520-( )=3 ()-1=7 ()÷1=∏()-14=5 ()-17=0 11-( )=10 18-( )=0 ( )-16=0 9-( )=8 5÷( )二9 ()+8=9 ()-8=212+( )=13 11+( )=13 8+( )=16 ( )+11=16 ()-4=9 ( )+14=18 ()+5=13 ()-8=9 ( )-6=1018-( )=7 ( )+8=14 7÷( )=12 ()+5=15 15-( )=8 ()÷7=12()-11=4 ( )+4=14 17-( )=1 5+( )=11 8÷( )二9 7+( )=10()-13=1 6-( )二3 () -14=0 17-( )二12 () -13=7 ( )+2=815-( )二13 18-( )=16 ()-10=54-( )=0 14-( )=12 ( )-8=4( )-5=6 18-( )二1 6÷( )=19() -13=3 ( )+4=20 ( )+5=1016-( )=1 13-( )=2 () +4=1220-( )二13 () -2=18 ( )-3=6( )-3=5 ()- 6=11 13-( )二8( )+2=9 9÷( )=11 () -3=137÷( )二13 ()■-15=2 ( )-5=0( )÷3=9 14+( )二18 18-( )=115÷( )二73÷( )二4 1+( )=11 10+( )二12 () -16=3 4÷( )二912÷( )二17 6÷( )=16 10-( )=3 () -13=2 12-( )二5 8-( )=1 1÷( )二3 19-( )二6 13-( )二5 () -11=5 18-( )二8 13+( )=2014-( )二8 18-( )=15 20-( )二2)+14=16 10+( )=19 ( )-3=2)+12=13 9÷( )=15 4÷()二17()-6=4 ()-5=2 15+( )=19 3÷( )二7 18-( )二4 ( )+11=18 )+14=19 5÷( )=18 1÷( )=16 6+( )=20 1÷( )二2 () -1=11 ( )-11=0 ()÷1=12 ( )+4=10)+17=20 ( )+9=16 18-()二6( )+3=13 ()-1=13 12+()二1515-( )=9 ()-1=16 () -4=10 ()+3=12 ( )+9=20 20-( )=120-( )=6 ()+1=7 4÷( )=10 2+( )=18 ()+6=7 ( )+7=9)+16=20 20-( )=14 8-()二46+( )=11 19-( )=18 1÷( )=14 )+18=20 11-( )二718-( )二9()+5=6 ()÷7=17 () -15=0( )+7=19 14-( )=7 13-()二3( )+8=13 ( )+3=18 ( )-4=5()+3=5 17-( )二3 10-( )=1()-1=4 4÷( )=15 18-( )=13 ( )+11=20 () -8二3 16-( )二156+( )=18 ()÷1=8 ( )+9=13( )+10=13 18-( )二3 15-( )=7 ( )+10=17 1+( )=15 16-( )=12 ( )-1=19 ()- 12=2 ( )-9=6( )-10-6 ( )+3=20 8÷( )=17 10-( )=9 () -5=1 9÷( )=18 ( )÷11=12 ()- 3=10 ( )-1=6 ( )+6=18 18-( )=2 ( )-2=9 4-( )=2 ()- 3=12 10+( )=11 8+( )=14 ()- 9=10 ( )+5=18 ( )+19=20 ()- 1=17 () -4二13 ()-3=17 ()- 20=0 () -10=4 ()+7=8 12-( )=1 () -4=118-( )=0 () -5=9 () -12=15+( )=15 6-( )=0 ( )+8=194+( )=14 20-( )=15 13-( )=6()- 14=1 () -2=4 14-( )二6 1÷( )=19 ()- 3=11 15-( )=1015-( )=14 18-( )二12 12-( )二3 () -8=1 1÷( )=4 20-( )=419-( )二2 ()- 2=17 8÷( )=158-( )二3 () -9=5 2÷( )=12( )+13=15 ( )+12=19 5-()=1 15÷( )=17 () -9=2 9-( )=0 ()- 5=14 8÷( )=19 2÷( )=17 8÷( )=20 ()- 12=0 2-( )=1 ()- 10=2 ( )+1=18 ( )÷3=7 ( )+13=16 () -1=0 3÷( )=15 () -8=8 12÷( )=20 14+( )=16 18-( )=14 () -6=6 () -13=0 18+( )=19 8-( )二6 7+( )=1417-( )二8 14+( )=19 19-( )=7 () -6=3 ( )+1=20 ( )+4=5() -2=1 7-( )=3 () -11=6() -2=5 ()- 3=16 19-( )二8( )+6=16 () -2=3 ( )-10=0 ( )+11=13 12-( )=10 ( )÷2=18 ()+1=6 ()- 19=0 ( )-2=14 ( )+13=20 ( )+6=19 ( )-6=1 10-( )二5 11+( )=16 ( )-7=10 16-( )二4 9÷( )=17 ( )+5=7 ( )-4=16 13-( )二12 ( )+1=16 7-( )二4 4÷( )=6 ( )+2=10 19-( )二13 20-( )二8 ( )-9二4 ( )+10=20 ()- 9=11 14-( )=33÷( )二9 14+( )=20 3÷( )=14 ()+2=15 ()- 10=9 20-( )=10()-7=12 ( )+8=18 ( )-2=152÷( )二6 ( )+6=12 9÷( )二13 ()+2=4 3÷( )=12 19-( )=11 ()÷1=15 ( )+9=15 ( )-10=113+( )=17 16+( )=19 ( )-1=24÷( )二8 () -3=0 ( )+4=15( )+11=17 18+( )=20 ( )+15=19()-3=9 17-( )=14 11+( )=18 19-( )二15 ( )+9=14 ( )+9=1018-( )二5 ()+3=17 ( )+12=148÷( )=11 ( )+4=11 ( )+1=10 12-( )二7()-7=9 ( )+12=16( )+14=17 ()÷5=8 ()÷7=13()-2=8 ( )+15=20 3÷( )=11 ( )+7=16 15+( )=20 13-( )=7()÷3=6 9÷( )二14 2÷( )二3 16-( )二2 2-( )二0 () -7=2()-12=3 ()-1=3 18-( )=10( )+16=19 ( )+16=17 12÷( )=16()-2=11 ( )+9=11 2÷( )=10 16-( )=11 ()-10=7 8-( )=29÷( )=19 ()-4=2 11+( )=17 12÷( )=14 2÷( )二8 20-( )二9()-2=7 8÷( )二18 17-( )二4 5+( )二17 16-( )=7 () -7=4( )+3=16 3÷( )=10 3÷( )=1819-( )=1 ( )+7=11 5+( )=8 ()÷ 8=12 ( )+2=5 ()-5=46-( )二5 () +17=19 ()-3=8() -4=8 ( )-8=12 1+( )=18 4-( )=1 11+( )=14 ( )+2=19 ()- 15=4 ( )-15=5 10-( )=7 ()÷ 1=14 ( )+8=15 ()-7=04÷( )二5 10- ()二6 ()-12=5() -6=5 ( )-17=3 8-( )=7 16+( )二17 ( )-14=5 ()-17=0()- 1=10 ( )-18=0 16-( )=0 9-( )二8 ( )+4=9 1÷( )二9() -8=2 ( )+1=13 11+( )=13 ()÷ 8=16 5÷( )=16 ()-4=94÷( )=18 ( )+5=13 ()-8=916-( )=10 ( )-11=7 6+( )=14 7÷( )=12 10+( )二15 15-( )=8 ()÷ 7=12 ( )-11=4 10+( )=14 ()- 16=1 ( )+6=11 ()÷1=97÷( )=10 ()- 13=1 () -3二3()- 14=0 17-( )二12 20-( )=7 6÷( )二8 ()- 2=13 18-( )=16 ()- 10=5 () -4二0 14-( )二12 () -8=4 11-( )二6 ()- 17=1 ()+：13=19 16-( )二3 16+( )=20 ()+ 5=10 ()- 15=1 13-( )二2 ()+ 4=12 ()- 7=13 20-( )=18 9-( )=6 8-( )二5 17-( )=11 () -5=8 7÷( )=9 9÷( )=11 16-( )=13 7÷( )=13 17-( )二25-( )=0 6÷( )=9 14+( )=18 18-( )=11 5÷( )=7() +1=4( )+10=11 10+( )二12 19-( )=3 4÷( )二9 12÷( )=17 ()+：10=16 () -7=315-( )二2 12-( )二5 8-( )=1 () +2=3 ()- 13=6 () -8=5 ()- 11=5 18-( )二8 13+( )=20 14-( )二8 ()- 3=15( )-18=2 2÷( )=16 ( )+9=19( )-3=2)+13=17 1÷( )=1310-( )=4( )+6=157-( )=2( )+4=19)+11=18()÷4=75+( )=19( )-14=4( )+13=181+ ()二16 ( )+14=20 ()+1=2 ( )-1=11 11-( )=0 11+( )=12 ( )+4=10 ( )+17=20 7÷( )=1618 -()二6 ( )+3=13 ()-1二13 ( )+3=15 15-( )二9 17-( )=16 ( )-4=10 ()+3=12 11+( )=20 ( )-19=1 ( )-14=6 6÷( )二7 ( )+6=10 2÷( )=18 ()÷6=72 ÷()二9 4÷( )=20 ( )-6=148 -()二4)+13=14 6÷(2÷()=11)=20( )-1=1811-( )=7( )-9=9 ()+5=6 10+( )二17 ( )-15=0 12+( )=19 14-( )二7 13 -()二3 5÷( )=13 ( )+3=18() -4二5 ()÷3=5 17-( )=3 10-( )=1 5-( )二4 ( )+11=15 ()- 5=13 9÷( )=20 11-( )二3 16-( )=15 ( )+12=18 ( )+1=84÷( )=13 3÷( )=13 18-( )二3 15-( )二7 7+( )=17 1÷( )=15 ()- 4=12 ( )-1=19 () -12=215-( )二6 ( )-10=6 ( )+3=20 ( )+9=17 10-( )二9 ( )-5=19÷( )=18 ( )+11=12 13-( )=107-( )二6 12+( )=18 18-( )二2 11-( )二9 4-( )二2 () -3=1210+( )=11 8÷( )=14 () -9=10( )+5=18 ( )+19=20 18-()二17()- 4=13 ()-3=17 20-( )=0 14-( )二4 1÷( )二8 12-( )=1 ()- 4=11 8-( )=0 14-( )二9 ()- 12=1 ( )+10=15 6-( )=0 ( )+8=19 4÷( )=14 20-( )二1513-( )=6 15-( )=1 ()-2=4()-8=6 ( )+18-19 14-( )=11 15-( )=10 15-( )=14 ()-6=1212-( )=3 ()-8=1 1÷( )二4 20-( )=4 ()-17=2 ()-2=178+( )=15 8-( )=3 ()-9=5 ( )+10=12 ( )+13=15 ( )+12=195-( )=1 ()÷2=17 ()-9=29-( )=0 19-( )=14 8+( )=19 ( )+15=17 ( )+12=20 ()-12=0()-1=1 ( )-10=2 17+( )=18 4÷( )=7 ( )+13=16 ()-ι=o( )÷12=15 ()-8=8 ( )+8=20 ( )+2=16 18-( )=14 ()-6=6()-13=0 ( )+1=19 ()-2=6 ( )+7=14 17-( )=8 14+( )=19 19-( )=7 ()-6=3 ( )+1=20 ()+4=5 3-( )=1 ()-4=3()-11=6 7-( )=5 19-( )=16()- I1=8 10+( )=16 5-( )=310-( )=0 ( )+11=13 12-( )=10 16+( )=18 ()+1=6 ( )-19=016-( )=14 ( )+13=20 13+( )=19 () -6=1 10-( )=5 ( )+5=1617-( )=10 16-( )=4 9+( )=17 2÷( )二7 ( )-4=16 ()-1=12()÷ -1=16 ()-3=4 ()+2=68÷( )=10 ()-6=13 ()-12=8() -9=4 ( )+10=20 ( )-9=11 ()- 11=3 ( )+6=9 14+( )=20 ()÷：I1=I4 13+( )=15 ( )-10=9 ()-：10=10 ()-7=12 ( )+8=18 ()- 2=15 2÷( )=6 ( )+6=129÷( )=13 2÷( )=4 ( )+9=12 ()- 8=11 ()+1=15 6+( )=15 ()- 10=1 13+( )=17 ( )+3=19 () -1=2 ()+4=8 ()-3=0()÷ -4=15 6+( )=17 18+( )=204+( )=19 12-( )=9 ()-3=14( )+7=18 ()-4=15 ( )+9=141+( )=10 ()-13=5 ()÷3=17 ( )+12=14 8+( )=11 7÷( )=11 9+( )=10 ()-5=7 16-( )=9 ( )÷12=16 ( )+14=17 ()÷5=86+( )=13 ()-2=8 ( )+15=20 3÷( )=11 ( )+7=16 ( )+5=20 ()-6=7 ()+3=6 9+( )=14 2÷( )=3 16-( )=2 ()-2=09-( )=2 15-( )=3 ()-1=318-( )=10 ( )+16=19 ( )+16=17 12+( )=16 ( )-2=11 ( )+9=112+( )=10 ()-5=11 17-( )=7 ()-6=2 9+( )=19 6-( )=2 11+( )=17 ( )+2=14 ( )+6=8 20-( )=9 ()-2=7 8+( )=18 ()-13=4 5÷( )=17 ()-9=7()-7=4 ( )+3=16 ( )+7=103÷( )=18 ()- 18=1 ()+7=115÷( )二8 ( )+8=12 ()÷2=5 9-( )二4 () -1=5 ( )+17=19()-3=8 12-( )二8 20-( )二12 ( )+17=18 4-( )=1 11+( )=14 ∏÷()=19 ()■15=4 20-( )二5 10-( )二7 ( )+1=14 ( )+8=157-( )二0 4÷( )二5 () -4=6 17-( )二5 11-( )二5 ()- 17=3 ()-1=7 16+( )=17 ()- 14=5 17-( )二0 11-( )=10 18-( )=0 ( )-16=0 () -1=8 5+( )=9 1÷( )二9 () -8=2 12+( )=13 11+( )=13 8÷( )二16 ( )+11=16()-4=9 ( )+14=18 8÷( )=13 ()-8=9 ()- 6=10 18-( )二76÷( )=14 ()÷5=12 10+( )二15 ()-7=8 ()÷7=12 ()- 11=4( )+4=14 17-( )=1 5÷( )=11( )+1=9 ()+ 3=10 14-( )=16-( )二3 ()- 14=0 ()-5=12() -13=7 6÷( )=8 ()-2=13() -2=16 15-( )二5 ()-4=0() -2=12 () -8二4 11-( )=6() -17=1 6÷( )=19 ()-13=316+( )=20 5+( )=10 ()-15=113-( )二2 8÷( )=12 20-( )=13 20-( )=18 () -3=6 ()-3=517-( )=11 13-( )二8 7÷( )=99÷( )=11 ()- 3=13 7÷( )=1317-( )二2 5-( )=0 6+( )=9 14+( )=18 18-( )=11 ()÷2=7( )÷1=4 1÷( )=11 ()÷2=12() -16=3 4÷( )=9 ()÷5=17()- -10=16 10-( )二3 15-( )=2( )-7二5 () -7=1 ()+2=3() -13=6 13-( )二5 16-( )=5() -10≡8()÷ 7=20 ()一6二8()-3=15 20-( )=2 2÷( )=16 ( )+9=19 5-( )二2 1÷( )二13 9÷( )=15 4÷( )=17 10-( )二4 ()-5=2 15÷( )=19 3÷( )二718-( )二4 7÷( )=18 5÷( )=19 5+( )=18 1+( )=16 ( )+14=201÷( )二2 12-( )=11 ( )-11=011+( )二12 6÷( )=10 ( )+17=207÷( )=16 ()- 12=6 ( )+3=13 ()-1=13 12+( )=15 ()-6=9()-1=16 14-( )=10 ()÷3=1211+( )=20 20-( )=1 20-( )二6()+1=7 ( )+6=10 ( )+16=181÷( )二7 2÷( )=9 ( )+16=20( )-6=14 8-( )二4 ()÷5=1119-( )=18 1+( )二14 ( )+18=20()-4=7 () -9=9 1÷( )=6()+7=17 ()- 15=0 ( )+7=1914-( )二7 ()- 10=3 5÷( )二1315÷( )=18 () -4二5 2÷( )二5 17-( )二3 () -9=1 5-( )二4 (卜-11=15 18-( )=13 ()+：11=20 11-( )二3 16-( )二15 ()+：12=18 ()+1=8 ()+ 9=13 ()+1 .0=13 18-( )二3 () -8=7 7÷( )=17 (卜-14=15 ()- 4=12 ()- 1=1914-( )二2 15-( )=6 16-( )=6 ∏÷()=20 8÷( )=17 () -1=96-( )=1 ()+ 9二18 1+( )=1213-( )=10 () -1=6 12+( )=18()-16=2 () -2=9 4-( )=2()-3二12 10+( )=11 8÷( )=14()-9=10 13+( )=18 ()+：19=2018-( )二17 17-( )=13 ()- 3=1720-( )=0 ()- 10=4 1÷( )二812-( )=1 ()- 4=11 8-( )=014-( )二9 13-( )=1 5÷( )=15 ()-6=0 ()+ 8=19 ()+1 .0=14( ) -5=15 13-( )二6 () -14=1 ( )-2=4 ( )-8=6 1÷( )=19 ( ) -3=11 15-( )=10 ()-1=14 18- ( )二12 12-( )二3 9-( )=1 ( )+3=4 () -16=4 19-( )二2 ( ) -2=17 8÷( )二15 ()-5二3 14 -( )二5 ()∏H10=12 2÷( )二15 ( )4-12=19 ( )-4=1 ()+2=17 11 -( )二2 ( )-9二0 19-( )=14 ( )4-I1=I9 2÷( )二17 (卜F12=20 12 -( )=0 2-( )=1 ()-10=2 ( ) +1=18 4÷( )=73÷( )=16 1 -( )=0 (H -12=15 ()-8=8 12÷ ( )=20 14+( )=16 18-( )=14 12 -( )=6 13-( )=0 ()+1=19 ( )-2=6 () +7=14 17-( )二8 ( ) +5=19 19-( )二7 ()-6=3 ( ) +1=20 ( )+4=5 3-( )=1 7 -( )二3 17-( )二6 7-( )二5。

一年级科学20以内括号填数练习本练旨在帮助一年级学生熟练掌握20以内的括号填数技巧。

通过填写合适的数字，学生将加强对数学概念的理解和运用能力。

练1：填空题请依据下列提示，在括号内填上适当的数字，使等式成立。

1. 3 + ( ) = 82. ( ) + 5 = 133. 10 - ( ) = 64. ( ) + 9 = 12练2：判断正误请判断下列等式是否正确，正确的在括号内填"√"，错误的在括号内填"×"。

1. ( ) 4 + 6 = 102. ( ) 7 + 3 = 93. ( ) 12 - 8 = 64. ( ) 9 + 3 = 14练3：数学推理请根据下列数字关系，填写合适的数字。

1. 5 + 6 = ( ) + 72. ( ) - 3 = 8 - 23. 9 - ( ) = 5 - ( )4. 2 + 4 = ( ) - 1练4：图形练请根据下列图形提示，填写合适的数字。

1. 正方形边长为( )厘米。

2. 三角形内共有( )个边。

3. 矩形的宽度为( )厘米，长度为( )厘米。

练5：实际问题请解答下列实际问题，并在括号内填写合适的数字。

1. 小明手中有( )个苹果，他从中通过给小红( )个苹果后，还剩( )个苹果。

2. 一共有( )个学生排队，如果已经有( )个学生通过，还剩( )个学生没通过。

答案参考练1：填空题1. 3 + (5) = 82. (8) + 5 = 133. 10 - (4) = 64. (3) + 9 = 12练2：判断正误1. (√) 4 + 6 = 102. (×) 7 + 3 = 93. (√) 12 - 8 = 64. (×) 9 + 3 = 14练3：数学推理1. 5 + 6 = (11) + 72. (5) - 3 = 8 - 23. 9 - (4) = 5 - (0)4. 2 + 4 = (6) - 1练4：图形练1. 正方形边长为(8)厘米。