人教版小学三年级下册数学口算天天练全套小学三年级数学口算天天练①〔1〕611-31= 〔2〕890-870=〔3〕516-191= 〔4〕808-38=〔5〕967-702= 〔6〕316-210=〔7〕483-465= 〔8〕840-479=〔9〕914-775= 〔10〕933-137=〔11〕912-894= 〔12〕838-688=〔13〕27 + 46 = 〔14〕810 - 125 =〔15〕92 + 65 = 〔16〕90 + 47 =〔17〕18 + 15 = 〔18〕18 + 53 = 〔19〕29 + 32 = 〔20〕398 - 148 =〔21〕256 + 775 = 〔22〕449 - 312 = 〔23〕202 – 155 = 〔24〕106 + 537 =〔25〕916 + 861 = 〔26〕713 - 288 = 〔27〕954 - 286 = 〔28〕72 + 76 =〔29〕71 + 68 = 〔30〕64 － 60 = 〔31〕716 - 117 = 〔32〕766 + 792 =〔33〕79－39 = 〔34〕84－17= 〔35〕175 + 157 = 〔36〕38 + 69 =〔37〕83 － 62 = 〔38〕12 + 98 = 〔39〕808 + 213 = 〔40〕704 - 124 = 〔41〕607 + 914 = 〔42〕645 － 239= 〔43〕648 - 585 = 〔44〕352 + 708 =〔45〕970 + 602 = 〔46〕860 - 162 = 〔47〕343 + 801 = 〔48〕806 + 487 =〔49〕691 + 400 = 〔50〕56-14 =小学三年级数学口算天天练②〔1〕353 + 939 = 〔2〕802 - 668 =〔3〕287 - 167 = 〔4〕859 - 371 =〔5〕941 - 343 = 〔6〕〕472 + 425 =〔7〕900 - 168 = 〔8〕300+186 =〔9〕900 - 554 = 〔10〕800 - 200 =〔11〕460 + 991 = 〔12〕700 - 666 =〔13〕300 - 122 = 〔14〕900 - 353 =〔15〕500 - 162 = 〔16〕900 - 705 =〔17〕400 - 133 = 〔18〕200 - 158 = 〔19〕300 - 257 = 〔20〕400 - 157 =〔21〕700 - 205 = 〔22〕785 + 937 =〔23 〕274 - 226 = 〔24〕455 + 695 =〔25〕204 - 191 = 〔26〕224 + 944 = 〔27〕704 + 736 = 〔28〕285 + 691 =〔29〕300 - 288 = 〔30〕947 - 236 = 〔31〕1200－400= (32〕120－ 40=〔33〕166 - 120 = 〔34〕727 + 517 = 〔35〕33× 2 = 〔36〕332 - 246 =〔37〕25＋32 = 〔38〕73 ＋ 26= 〔39〕 150 + 144 = 〔40〕2 ×14=〔41〕1400－ 800= 〔42〕320×3 = 〔43〕 179 －79 = 〔44〕792 + 192 =〔45〕544 - 492 = 〔46〕4× 70 = 〔47〕65 ＋35= 〔48〕4 × 120=〔49〕55-37= 〔50〕38－19=小学三年级数学口算天天练③〔1〕25×4 = 〔2〕30 ＋ 700 = 〔3〕73－30 = 〔4〕1400＋1400=〔5〕48÷ 4= 〔6〕33＋〔〕=100 〔7〕40÷ ( ) =20 〔8〕3×( )=3000〔9〕60÷6 = 〔10〕2×20＋2= 〔11〕80×2×0= 〔12〕52 ÷ 4 =〔13〕30×3＋ 4= 〔14〕80÷5÷4 = 〔15〕68－19= 〔16〕179 －79 =〔17〕72 ÷9= 〔18〕98＋17-36= 〔19〕30＋15＋30＋15= 〔20〕84－17－43=〔21〕100×3×3= 〔22〕20×4 ÷4= 〔23〕11×2×5= 〔24〕6×8=〔25〕46÷2 = 〔26〕700＋ 500 = 〔27〕3× = 〔28〕4 ×12 =〔29〕700 ＋900= 〔30〕9 ×300= 〔31〕1400 －800 = 〔32〕36 ÷3 = 〔33〕1300－600= 〔34〕6 ×40 = 〔35〕1200 －500 = 〔36〕130× 3=〔37〕39＋43 = 〔38〕49－26= 〔39〕93÷ 3 = 〔40〕90－34= 〔41〕2×210= 〔42〕86÷2 = 〔43〕37 ＋ 36= 〔44〕90－43= 〔45〕800×8= 〔46〕1200－400= 〔47〕120－ 40= 〔48〕33× 2 =〔49〕29＋32 = 〔50〕39＋ 26=小学三年级数学口算天天练④〔1〕1400－ 800= 〔2〕320×3 = 〔3〕2 ×14= 〔4〕4× 70 =〔5〕65 ＋35= 〔6〕4 × 120= 〔7〕55＋37= 〔8〕4 ×12 =〔9〕38－19= 〔10〕1400＋1400= 〔11〕25×4 = 〔12〕68- 17=〔13〕73－30 = 〔14〕48÷ 4= 〔15〕42×2 = 〔16〕47＋ 32=〔1780÷ 4= 〕〔18〕42÷ 2 = 〔19〕25＋ 57= 〔20〕30 ＋ 700 =〔21〕60× 3= 〔22〕72 －28= 〔23〕84 －34= 〔24〕4 ×22 =〔25〕43 ×2 = 〔26〕55 ＋37= 〔27〕500× 6= 〔28〕44＋ 46=〔29〕60÷ 2 = 〔30〕65－ 59= 〔31〕52－ 45 = 〔32〕300 ×7 =〔33〕300-254= 〔34〕66÷ 6= 〔35〕66 ＋24 = 〔36〕5× 800〔37〕44 ÷4 = 〔38〕65－ 35 = 〔39〕72 －68 = 〔40〕3× 21 =〔41〕38 ＋19 = 〔42〕71－ 24 = 〔43〕4× 21 = 〔44〕4× 600 =〔45〕1100－500= 〔46〕80－ 26= 〔47〕82÷ 2 = 〔48〕50－ 26=〔49〕15＋ 69= 〔50〕75 －68=小学三年级数学口算天天练⑤1) 40÷2= 2) 60×6= 3) 900÷9= 4) 28+56=5) 14×6= 6) 700-300= 7) 51-23= 8) 21÷7=9) 63÷7= 10) 28+56= 11) 600×8= 12) 78-29=13) 80+120= 14) 5×60= 15) 15×2= 16) 12×8=17) 36-19= 18) 120-24= 19) 16÷2= 20) 50-27=21) 39+180= 22) 200×4= 23) 39÷3= 24) 20-14=25) 16×5= 26) 40÷2= 27) 21÷7= 28) 40÷2=54+46= 32) 660-600=33) 47+56= 34) 600×8= 35) 27+36= 36) 26-16=37) 30+56= 38) 25+17= 39) 60÷3= 40) 800×3=41) 480-88= 42) 6000÷6= 43) 130×3= 44) 120-27=45) 16×3= 46) 30÷3= 47) 84+28= 48) 200×4=49) 72-24= 50) 68+54=小学三年级数学口算天天练⑥51) 40÷4= 52) 20×3=53) 58+69= 54) 18+27= 55) 35-26= 56) 32×3=57) 72+18= 58) 51-26= 59) 60÷4= 60) 700-300=61) 1×40= 62) 100×2= 63) 93-28= 64) 75+25=65) 15×6= 66) 98-49= 67) 12×5= 68) 62+18=200÷5= 72) 40÷2=73) 300×4= 74) 60+26= 75) 140×3= 76) 28+54=77) 93-28= 78) 37+46= 79) 360-64= 80) 13×4=81) 84+26= 82) 60÷6= 83) 40÷2= 84) 60×2=85) 55+36= 86) 60+100= 87)69+18= 88) 43-25=89) 45+26= 90) 20×3= 91) 300×4= 92) 25+17=93) 46-28= 94) 58+34= 95) 25+67= 96) 42÷7=97) 20÷2= 98) 140×3= 99) 13×0= 100) 93-28=小学三年级数学口算天天练⑦1) 33÷3= 2) 920×2= 3) 120×4= 4) 68÷2=5) 120×4= 6) 41×3= 7) 510×2= 8) 3×220=9) 3×220= 10) 88÷4= 11) 80÷2= 12) 23×2=13) 21×2= 14) 72÷8= 15) 48÷8= 16) 90÷9=17) 200×4= 18) 6×11= 19) 88÷8= 20) 120×4=21) 23×2= 22) 483-17= 23) 310×3= 24) 80÷4=25) 2×13= 26) 389+= 27)3×220= 28) 9999×1=29) 389+= 30) 700×7= 31)88÷8= 32) 99÷9=33) 554-231= 34) 80÷2= 35) 0×144= 36) 700×7=37) 8×200= 38) 890+210= 39) 987-123= 40) 6×11=41) 391+242= 42) 1000-800= 43) 12×4= 44) 6×11=45) 456-120= 46) 458-452= 47) 31×4= 48) 78-69=49) 398+243= 50) 61-47=小学三年级数学口算天天练⑧51) 68÷2= 52)44÷4=53) 68÷2= 54) 96÷3= 55) 93+128= 56) 120×4=57) 3×210= 58) 120×4= 59) 48+25= 60) 41×3=61) 457+17= 62) 44÷4= 63) 88÷4= 64) 456-128=65) 32×2= 66) 2×13= 67) 473—228= 68) 32×2=69) 186+489= 70) 21×2= 71) 23×2= 72) 33÷3=73) 971-248= 74) 458-459= 75) 99÷9= 76) 33-18=77) 88÷4= 78) 84÷2= 79) 44×2= 80) 130×3=81) 31×4= 82) 37-18= 83) 33÷3= 84) 33÷3=85) 458-359= 86) 44×2= 87) 3×210= 88) 0×144=89) 456-127= 90) 8×200= 91) 971-242= 92) 890+210=93) 482-283= 94) 33÷3= 95) 463+218= 96) 430×1=97) 789+35= 98) 29÷29= 99) 389+= 100) 88÷4=小学三年级数学口算天天练⑨〔1〕28÷4＝〔2〕3800＋200＝〔3〕260－98＝〔4〕7×6＝〔5〕238＋45＝〔6〕35＋28＝〔7〕2×6÷3＝〔8〕7×8＋400＝〔9〕65＋56＝〔10〕130－94＝〔11〕63÷9＝〔12〕82－54＝〔13〕400－35＝〔14〕6×5×7＝〔15〕56＋38＝〔16〕800－190＝〔17〕740＋680＝〔18〕64÷8＝〔19〕54－39＋27＝〔20〕7×6-17＝〔21〕65＋27＝〔22〕63÷9＝〔23〕24÷8＝〔24〕24÷6＝〔25〕36÷6＝〔26〕30÷6＝〔27〕61－22＝〔28〕14＋28＋36＝〔29〕8×9×0＝〔30〕54÷9＝〔31〕35÷7＝〔32〕5×9＝〔33〕6×9＝〔34〕7×5－15＝〔35〕15+278-169＝〔36〕42＋79＝〔37〕35÷5+35＝〔38〕33＋64÷8＝〔39〕33＋56÷7＝〔40〕4×4－11＝〔41〕64＋26＝〔42〕65＋55＝〔43〕9×8＝〔44〕81－48＝〔45〕35÷7÷5＝〔46〕72÷9＝〔47〕800－725＝〔48〕36＋72÷8＝〔49〕5×9+28= 〔50〕7×6-29=小学三年级数学口算天天练⑩〔1〕24÷8＝〔2〕56÷〔〕＝8 〔3〕〔〕－189＝642 〔4〕5×〔〕＝40 〔5〕〔〕÷4＝9 〔6〕87－〔〕＝18 〔7〕〔〕×4÷6＝6 〔8〕67＋33－75＝〔9〕〔〕×3＜20 〔10〕〔〕×4＜33 〔11〕〔〕×5＜19 〔12〕〔〕×6＜47 〔13〕8×〔〕＜47 〔14〕5×〔〕＜28 〔15〕7×〔〕＜50 〔16〕9×〔〕＜57〔17〕34÷9＝〔〕......7 〔18〕34÷8＝〔〕......2 〔19〕34÷7＝〔〕......6 〔20〕34÷6＝〔〕 (4)〔21〕44÷〔〕＝5......4 〔22〕30÷〔〕＝3......3 〔23〕60÷〔〕＝6......6 〔24〕37÷〔〕＝5 (2)〔25〕18÷3＝〔26〕350÷50= 〔27〕12×40= 〔28〕450－308=〔29〕560+80= 〔30〕7×70= 〔31〕82－56= 〔32〕560÷4=〔33〕28+37= 〔34〕26×3= 〔35〕88÷22= 〔36〕160×5=〔37〕640÷8= 〔38〕80+520= 〔39〕720÷80= 〔40〕670－250=〔41〕0×85= 〔42〕30×5= 〔43〕707÷7= 〔44〕510×6=〔45〕640÷40= 〔46〕3400－900 = 〔47〕72÷12 = 〔48〕18×40 =〔49〕750÷50 = 〔50〕45+15×6=小学三年级数学口算天天练⑾〔1〕110× 8= 〔2〕66 ÷3 = 〔3〕40÷2= 〔4〕560÷14 =〔5〕390÷13 = 〔6〕600÷15 = 〔7〕72÷24 = 〔8〕200÷25 =〔9〕840÷21 = 〔10〕800÷16 = 〔11〕120÷24 = 〔12〕65÷13 =〔13〕75÷15 = 〔14〕56÷14 = 〔15〕96÷24 = 〔16〕98÷14 =〔17〕80+60÷3= 〔18〕40-5×7= 〔19〕42÷6+20= 〔20〕160+70=〔21〕350-80= 〔22〕18-64÷8= 〔23〕30×20= 〔24〕540÷9=〔25〕300×6= 〔26〕16×6= 〔27〕90×2= 〔28〕1025÷25=〔29〕3020-0= 〔30〕200-33×3= 〔31〕25+9×4= 〔32〕336+70=〔33〕36×10= 〔34〕120×25= 〔35〕25×16= 〔36〕5600÷80=〔37〕42+7-29= 〔38〕75-11×5= 〔39〕41+18÷2= 〔40〕70+45=〔41〕80-25= 〔42〕40×20= 〔43〕360÷40= 〔44〕70+(100-10×5)=〔45〕(80÷20+80)÷4= 〔46〕10+12÷3+20=〔47〕400÷4-20×5=〔48〕100-30×3+8= (49〕6×5÷2×4= 〔50〕250÷5×8=小学三年级数学口算天天练⑿1) 88-69= 2) 91-29= 3) 38-25= 4) 71-53= 5) 72-48=6) 32+49= 7) 79+28= 8) 81-37= 9) 62-18= 10) 26+68=11) 84-78= 12) 27+56= 13) 94-85= 14)70-36= 15) 47+35=16) 29-12= 17) 37-28= 18) 58+47= 19)91-33= 20) 45-28=21) 47+36= 22) 50-15= 23) 52-14= 24)62-49= 25) 55+36=26) 18+78= 27) 96-37= 28) 56+44= 29)32-191= 30) 28+27=31) 49+18= 32) 83-66= 33) 42+29= 34)80-25= 35) 95-77=26-17= 40) 98-59=41) 65+26= 42) 97-49= 43) 81-29= 44) 91-54= 45) 27+45=46) 61-44= 47) 69+18= 48) 63-39= 49) 61-47= 50) 48+46=小学三年级数学口算天天练⒀51) 26+48= 52) 74-49= 53) 92-18= 54) 16+76= 55) 46+18=56) 47-23= 57) 82-79= 58) 34+29= 59) 67+38= 60) 36+44=61) 78+53= 62) 42+29= 63) 70-54= 64) 58-39= 65) 39+56=66) 58-39= 67) 46+73= 68) 48-29= 69) 57+48= 70) 93-38=71) 37+48= 72) 34+57= 73) 43+39= 74) 31-25= 75) 39+27=76) 45-26= 77) 81-55= 78) 44-28= 79) 66-49= 80) 83+97=81) 95+55= 82) 77-68= 83) 79+43= 84) 22+96= 85) 90-34=61-43= 90) 71-44=91) 38+66= 92) 36+47= 93) 35+39= 94) 90-64= 95) 70-37=96) 28+48= 97) 78-49= 98) 63-29= 99) 96+36= 100) 48-29=小学三年级数学口算天天练⒁1) 55+24= 2) 20+39= 3) 53+37= 4) 67-22= 5) 100-65=6〕35+63= 7〕73-33= 8〕99-79= 9〕80-58= 10〕71+23=11〕89-35= 12〕55+39= 13〕78-43= 14〕94-58= 15〕42+27=16〕24+53= 17〕29+20= 18〕46+23= 19〕48+50= 20〕39+43=21〕67-47= 22〕66-36= 23〕87-25= 24〕48+41= 25〕59-25=26〕89-38= 27〕43+43= 28〕40+58= 29〕96-68= 30〕98-36=31〕85-21= 32〕25+44= 33〕37+60= 34〕62-36= 35〕93-61=36〕100-37= 37〕52+41= 38〕32+59= 39〕61-41= 40〕31+22=41〕88-52= 42〕81-36= 43〕90-67= 44〕92-42= 45〕74-49=46〕55-35= 47〕83-36= 48〕20+69= 49〕90-51= 50〕83-36=小学三年级数学口算天天练⒂51〕99-28= 52〕74-27= 53〕34+55= 54〕44+47= 55〕66-25=56〕66+27= 57〕75+21= 58〕34+55= 59〕26+48= 60〕64-28=61〕48+24= 62〕70+24= 63〕41+26= 64〕23+45= 65〕39+57=66〕29+31= 67〕86-25= 68〕76-35= 69〕89-55= 70〕80-28=71〕55+40= 72〕85-25= 73〕31+55= 74〕35+29= 75〕83-35=76〕46-25= 77〕96-75= 78〕79-40= 79〕95-65= 80〕87-37=81〕33+41= 82〕31+44= 83〕53+34= 84〕53-20= 85〕93-35=86〕76-24= 87〕61-39= 88〕60-20= 89〕26+67= 90〕96-22=91〕45-24= 92〕98-49= 93〕69-31= 94〕75-33= 95〕79-34=96〕29+62= 97〕36+51= 98〕89-30= 99〕37+43= 100〕83-55=小学三年级数学口算天天练⒃1〕48+27= 2〕81-27= 3〕47-28= 4〕57+38= 5〕28+77=6〕66-27= 7〕87-58= 8〕90-53= 9〕84-26= 10〕71-28=11〕62-48= 12〕78+44= 13〕25+27= 14〕24+58= 15〕81-46=16〕81-32= 17〕83-59= 18〕100-33= 19〕72-26= 20〕91-63=21〕23+57= 22〕95-46= 23〕46+44= 24〕74-57= 25〕94-46=26〕47-28= 27〕41-29= 28〕73+19= 29〕34+28= 30〕51-23=31〕59+19= 32〕95-58= 33〕52-28= 34〕34+28= 35〕96-37=36〕65-39= 37〕69+48= 38〕85-58= 39〕73-54= 40〕28+96=41〕35+47= 42〕47-28= 43〕41-26= 44〕57-49= 45〕60-38=46〕40-21= 47〕78-69= 48〕43+38= 49〕80-69= 50〕53+38=小学三年级数学口算天天练⒄51〕96-68= 52〕53+58= 53〕55-27 = 54〕23-15= 55〕32-26=56〕66+47= 57〕54-25= 58〕73+28= 59〕37-19= 60〕54-38=61〕61-43= 62〕84+47= 63〕25+36= 64〕34+59= 65〕81-46=66〕88-39= 67〕83-39= 68〕90-33= 69〕72-27= 70〕71-63=71〕23+58= 72〕95-49= 73〕46+47= 74〕74-59= 75〕64-46=76〕47+25= 77〕41-28= 78〕73+29= 79〕94+27= 80〕50-38=81〕50-19= 82〕95-57= 83〕72-29= 84〕34+29= 85〕96-48=86〕75-59= 87〕69+38= 88〕85-56= 89〕70-42= 90〕33+69=91〕75+48= 92〕47-29= 93〕41-22= 94〕57-19= 95〕60-38=96〕40-26= 97〕71-65= 98〕43+68= 99〕80-69= 100〕53+48=小学三年级数学口算天天练⒅〔1〕〔〕-59=44 〔2〕95-〔〕=16 〔3〕〔〕+68=77 〔4〕〔〕+36=91〔5〕〔〕-43=19 〔6〕35+〔〕=111 〔7〕〔〕+37=81 〔8〕〔〕-67=22〔9〕〔〕-20=38 〔10〕〔〕+44=93 〔11〕66-〔〕=29 〔12〕〔〕+13=72〔13〕25+〔〕=94 〔14〕44+〔〕=62 〔15〕33+〔〕=92 〔16〕〔〕-18＝26〔17〕36+〔〕＝112 〔18〕〔〕-48＝69 〔19〕〔〕+28＝96 〔20〕89-〔〕＝25〔21〕〔〕+45＝102〔22〕45+〔〕＝89 〔23〕89-〔〕＝29〔24〕〔〕+32＝123〔25〕25+〔〕＝104 〔26〕112-〔〕＝56 〔27〕〔〕+58＝83 〔28〕〔〕-56＝38〔29〕〔〕-43＝29 〔30〕45+〔〕＝98 〔31〕81-〔〕＝28 〔32〕48+〔〕＝61〔33〕55－〔〕＝19 〔34〕44-〔〕＝18 〔35〕〔〕+45＝113〔36〕〔〕-46＝58〔37〕23+〔〕＝81 〔38〕46+〔〕＝92 〔39〕63-〔〕＝16 〔40〕 66－〔〕＝38〔41〕45+〔〕＝88 〔42〕51-〔〕＝75 〔43〕22-〔〕＝8 〔44〕77-〔〕＝48〔45〕56+〔〕＝72 〔46〕58+〔〕＝121 〔47〕37+〔〕＝126 〔48〕91-〔〕＝ 44〔49〕57+〔〕＝143 〔50〕〔〕-88＝88小学三年级数学口算天天练⒆最大能填几〔1〕〔〕×96×〔〕〔9〕〔〕×4小学三年级数学口算天天练⒇〔1〕6×7+29＝〔2〕7×9-39 ＝〔3〕4×3+89＝〔4〕5×7-18＝〔5〕8×9-37＝〔6〕6×7+58＝〔7〕3×8-16＝〔8〕5×6-18＝〔9〕8×9-43＝〔10〕8×7+44＝〔11〕9×4+75＝〔12 〕8×8-56＝〔13〕28＋7×8＝〔14〕5×8-24＝〔15〕100－12×8＝〔16〕(24＋16)÷8＝〔17〕60＋18×5＝〔18〕15×4×3＝〔19〕82－45÷9＝〔20〕12×6-24＝〔21〕(81－78)×6＝〔22〕48÷6×8＝〔23〕80÷4×6＝〔24〕86-48÷9＝〔25〕80×4－200＝〔26〕9×4＋44=〔27〕350÷5－70＝〔28〕240÷ (3×2)＝〔29〕10×4-36= 〔30〕5×4－7= 〔31〕 8＋3×4＝〔32〕360÷9＋60＝〔33〕4×6＋36= 〔34〕6×9－39= 〔35〕5×5＋48= 〔36〕9×9－69=〔37〕13×4＋36= 〔38〕55－46×9= 〔39〕87-6×8= 〔40〕 45＋27÷8=〔41〕49＋36÷5= 〔42〕86-66÷4= 〔43〕 81－68×5= 〔44〕 36＋36÷8=〔45〕80―65×4= 〔46〕7×6-28= 〔47〕3×9＋86= 〔48〕9×6-45=〔49〕23＋29÷4= 〔50〕34＋47÷9=。
口算乘法知识点一：一位数乘两位数或整十数的口算方法口算方法：先将两位数分成整十数和一位数相加的形式，再分别和这个一位数相乘，得到的积相加，和就是所求的积。
学习时可以先回忆表内乘法，再通过表内乘法口算出一位数乘两位数、整十数的积。
例如：160×6=_________方法一：先把160分成100和60，再用6分别乘100和60，即6×100=600,6×60=360。
最后将所乘得的积相加，即600+360=960。
因此160×6=960。
方法二：先将160中的0前面的数和6相乘，再在积的末尾添上1个0。
因为16×6=96，所以160×6=960。
知识点二：整十数乘一位数或两位数的口算方法口算方法：用整十数乘一位数或两位数时，先用整十数0前面的数与一位数或两位数相乘，再在积的后面添1个0。
例如：13×30=_________计算13×30时，先口算13×3的积，再在算出的乘积的末尾添上1个0.因为13×3=39，所以13×30=390。
知识点三：整百、整千数乘一位数或两位数的口算该方法同样适用于整百、整千数乘一位数或两位数的口算，都是先转化为表内乘法，再在积的末尾添上相应个数的0。
150×60=________计算150×60时，先口算15×6的积，再在算出的乘积的末尾添上2个0.因为15×6=90，所以150×60=9000。
记忆口诀：口算乘法我能行，先把0前面的数相乘。
0的个数要数清，乘积末尾添准0。
知识点一：一位数乘两位数或整十数例题1 看图填空。
求总共有多少根小棒？1、用加法列式：2、我可以这样想：每份是（），有这样的（）份，就是求（）个（）是多少。
用乘法列式：（）乘（）得（）个十，是（）。
练习1 口算训练14×3= 2×13= 6×50= 9×18= 8×88= 3×14= 13×2= 50×6= 18×9= 88×8=练习2 某种型号的公交车限乘31人。
数学三年级（下册）口算练习题400X7 = 80X9 = 400X8 = 440X8 = 80X6 = 300X5 = 600X7 = 6X300 = 90X7 = 80X6= 600X8 = 50X5 = 200X6 = 700X6 = 200X2 = 100X8 = 80X2 = 4X700 = 60X2 = 56X7~ 70X9 = 300X6 = 40X7 = 50X5 = 500X8 = 80X3 = 5X500 = 400X6 = 70X7 = 200X5 = 100X5 = 300X7 = 20X8 = 40X6= 500X6 = 45X9~ 20X3 = 36X9~ 500X7 =100X2 = 80X8 = 400X3 = 60X6= 60X3 = 40X7 = 70X3 = 300X5 = 200X3 = 90X7 = 800X5 = 36X9~ 200X4 = 400X5 = 54X8~ 50X5 = 40X2 = 300X6 = 60X9 = 50X5 = 600X6 = 6000X2 = 80X6 = 9X500 = 200X5 = 4X500 = 30X3 = 300X4 = 200X9 = 6X900 = 200X7 = 5X300 = 200X6 = 1000X7 = 400X5 = 300X8 = 100X5 = 80X9 = 4X600 = 700X6 = 3X500 = 3X400 =70-32 = 444-4 = 14+62 = 724-8 = 300X3 = 51-37 = 9X300 = 5X200 = 800X8 = 38 + 57 = 76-64 = 6X40 = 500X8 = 25+49 = 48-15 = 70-23 = 2X200 = 68-59 = 60X2 = 6X600 = 37 + 55 = 72-8 = 63-25 = 93 一8 =3X80= 200X3 = 800 X 5 =32 + 57 = 4X200 = 454-5 = 600X4 = 26 + 56 = 58 + 27 = 32 + 57 = 45 + 18 = 70-17 = 900X4 = 23X3 = 36-25 =38 + 57 = 57 + 34 = 24+39 =15 + 60 = 48-25 = 60X3 = 27 + 58 = 3X900 = 74一8 = 37 + 25 = 2X200 = 55 + 38 = 300X5 = 844-9 = 14+68 = 400X2 = 76-68 = 17 + 62 = 54+18 = 38*4 = 25 + 57 = 16 + 70 = 364-5 = 32 + 68 = 90X3 = 500X8 = 800X6 = 66 三7 = 764-8 = 94-48 = 35 + 18 = 30X2 = 23-16 = 824-9= 62 + 30 = 86-48 = 200X3 = 29 + 24 = 4X12 = 804-4= 304-3 = 1204-4 = 3004-6 = 2 604-6 = 804-8 = 004-5 = 704-7 =80004-4 = 7004-7 = 604-3 = 3004-5 = 300 — 3 = 404-5 = 4504-5 = 2000 + 5 = 60*2 = 400三5 = 40 三2 = 400 三8=5004-5 = 3004-5 = 1004-2 = 600^5 = 40*4 = 90 一3 =200F4= 804-2 = 800 一2 =3604-9 = 20004-2 = 800一5 =400^2 = 40004-2 = 300^4 = 504-5 = 40004-5 =904-9= 30004-4 =5604-8 = 1204-3 = 604-6 = 6304-9 = 4204-7 = 1804-2 = 1604-8 = 6404-8 = 1504-3 =3504-5 = 804-4 = 2404-6 = 8104-9 = 3604-4 = 404-2 = 350三7 = 540 三9 = 210 三3=150 — 3 = 1404-2 = 80*8 = 720F8 = 4004-8 = 30*3 = 240F8 = 50*5 = 2704-9 = 404-4= 604-3 = 250*5 = 320^8 = 804-2 = 1804-3 = 120 — 6 = 1604-2 = 304-3 = 204-2 = 50*5 = 5404-6 = 3004-5 = 604-2 = 1804-6 = 2104-7 = 2804-7 = 90*3 = 1204-4 = 3504-5 = 2504-5 =804-8 = 450*9 = 1204-2 = 320*4= 450*5 = 40*2 = 300三6 = 400 三5 = 280 三4=704-7 = 360*6 = 300 + 2 = 360*6 = 1804-3 = 200*4 = 270F6~ 294*6~ 295*5~495F9~ 462*6~ 528一8~870三6~ 775 宁5~ 846 宁6~636F2~ 7644-2^ 654*6~ 940F5~ 2664-7^ 936 = 2~ 732F3~ 784-6^ 784*8~ 924F3~ 932*4~ 828*3~714 三7~ 615 宁5~ 135 一5~306F9~ 207 宁9~ 455 宁5~ 508F2~ 872一2~ 938一7~ 486 = 6~ 270一6~ 572 一2~ 783 宁9~ 870 宁6~ 636 一2~ 720 — 9 = 2404-8 = 80*8 = 480F6 = 200*5 = 60 一6 = 904-9 = 1004-2 = 400^5 =4004-8 = 160*2 = 420 一6 =280^7 = 1804-6 = 240-F3 = 200 — 4 = 5604-8 = 270*9 = 5604-8 = 240*4 = 704-7 = 5404-6 = 4504-9 = 1204-4 = 1604-8 = 1004-5 = 2704-3 = 1504-3 = 1804-9 = 360一9=2504-5 = 3504-5 = 504-5 = 3504-7 = 804-4 = 8104-9 = 904-3 = 40*2 = 210*7 = 320三4 = 60 三2 = 300 三5=804-4= 160*4 = 450*5 = 210F3 = 2104-7 = 80*8 = 4204-6 = 4504-9 = 160*2 = 1804-9 = 3504-7 = 490*7 = 604-3 = 480 一6 = 1504-5 = 320 — 8 = 630 十7 = 3004-5 = 904-9= 250十5 = 604-6 = 2004-4 = 200^5 = 1804-2 = 1204-3 = 360一6 = 2404-6= 904-3 = 1204-6 = 540*6 =6404-8 = 2804-4 = 1504-3 = 2404-3 = 2804-7 = 160*8 = 3X15 = 28X2 = 4X13 = 23X4= 8X64 = 7X59 = 98X6= 19X2 = 13X6 = 7X68 = 15X6 = 7X36 = 19X3 = 78X4 = 58X5 = 4X24= 17X5 = 1X66 = 7X53 = 4X20 = 9X37 = 10X5 = 82X3 = 19X5 = 9X72 = 75X2 = 63X4 = 6X38 = 5X18 = 4X44 = 8X43 = 3X91 = 43X5 = 0X48 = 5X66 = 3X72 =5X99 = 5X62 = 86X9 = 8X40= 9X53 = 12X4= 15X6= 37X7 = 87X9 = 16X3 = 72X6 = 3X83 = 6X73 = 8X90 = 2X85 = 7X61 = 21X4 = 9X70 = 6X55 = 2X78 = 95X6 = 5X52 = 41X8 = 87X2 = 62X6= 26X3 = 60X5 = 6X25 = 4X11 = 54X7 = 11X7 = 43X0 = 3X81 = 93X7 = 9X96 = 14X4 = 4X70 = 74X6 = 9X88 = 93X3 = 32X8 = 4X54 =100X60 = 40X200 = 20X900 = 300X20 = 50X60 = 80X300 = 80X700 = 30X300 = 400X30 = 5X400 = 40X20 = 90X700 = 60X100 = 20X200 = 300X30 = 20X600 = 60X300 = 20X300 = 200X8 = 30X100 = 600X40 = 600X10 = 500X30 = 400X50 = 20X400 = 90X200 = 80X200 = 70X100 = 70X600 = 40X90 = 80X200 = 400X80 = 60X400 = 60X74 = 100X61 = 50X61 = 60X83 = 56X200 = 80X70 = 90X73 = 30X26 = 80X41 =49X90 = 54X200 = 30X66 = 30X11 = 17X80 = 40X97 = 40X88 = 56X90 = 90X57 = 67X60 = 80X60 = 70X31 = 300X45 = 70X46 = 80X52 = 21X300 = 21X70 = 30X77 = 58X60 = 14X600 = 58X80 = 63X40 = 79X20 = 61X80 = 80X83 = 56X70 = 500X18 = 82X90 = 23X40 = 45X70 = 700X11 = 37X50 = 8X50 = 50X53 = 32X70 = 83X40 = 400X22 = 200X29 = 30X35 = 90X38 = 50X36 = 13X90 =72X20 = 50X86 = 41X40 = 26X30 = 60X25 = 77X20 = 70X23 = 28X50 = 43X80 = 23X43~ 15X41~ 54X70~ 19X85~ 42X90~ 17X32~ 11X54^ 37X83~ 60X51~ 71X25~ 26X61~ 80X47~ 76X84= 41X99~ 21X22~ 11X6A 66X73~ 61X674 24X38~ 21X49~ 69X58~ 57X12~ 67X85~ 61X48~ 83X61~ 43X82~ 53X20^ 59X18~ 74X18~ 47X24~ 28X55~ 58X27~ 80X71~60X59~ 76X70~ 63X8~ 4004-8 = 2204-2 = 9X50 = 4804-4 120X2 = 12X5 = 280三4 = 580 三2 = 50 三6 = 4004-4= 8004-2 = 550 — 5 = 480*6 = 6X50 = 360 一6 = 3504-5 = 40X20 = 480 一8 = 70X7 = 9604-3 = 420 一7 = 7004-7 = 8104-9 = 12X20 = 360 — 3 = 7004-7 = 33-28 = 600^6 = 3X20 = 500-50 = 78+41 = 880 + 20 = 53+17 = 4504-9 = 884-9 = 2004-4 = 5X8+8= 174-5 = 300X7 =5X3+8= 6304-3 = 12X60 = 0X22 = 70-7 = 450X0 = 72 + 18 = 450 + 50 = 774-7 = 40X50 = 12X6 = 300 三6 = 20X50 = 64*16 = 490*7 = 704-2 = 102 + 20 = 65X10 = 6304-7 = 58 + 15 = 64*7 = 28 + 68 = 37-18 = 56-20 = 580 + 20 = 724-6 = 3X2+9= 3004-5 = 4604-2 = 5X7+4= 4004-8 = 450 一9 = 120X4 = 8X9+9= 324-8 = 7*2 = 634-8 = 6X90 = 3004-6 = 88 + 21 = 300-80 = 3004-3 =8004-4 =1604-4=404-6= 217毫米+ 25毫米1吨一400千克= 1千克一500克= 5000克一4千克= 2000 米 + 8000 米= 75分米一30分米= 50-38 =90-26 =120-80=300-30 =6X120 =480 + 70 =55*5 = 420-150 =7X8 =900+100 =36 一6 =2000 + 800 =63 宁7 =69+22 =560+40 =600-267 =1000-465 =324-5 =360 -90 = 294 -546 一7 = 23一5 = 294-3 = 45*6 = 384-6= 53*7 = 38 三9 =584-9 = 30X3 =8千米=()米20 + 75 = 3米=()厘米280+50= 4厘米=()毫米130-70= 7000千克=()吨7X5 = 40分米=()米724-9 = 2时=()分30 + 180=30厘米=( )分98-80 = 米5X8 =5千米=()米77 + 13 =534-9 = 604-8 =324-8 = 504-6=644-7 = 250 + 284 =940-372 = 500—249：—238 + 79 =58 + 23 = 700-537 = 210+450 = 26 + 524= r 6 6 270-80 = 21 一3 =13 + 3-7 =8 849 一7 = 100-40 = 47 78X800 = 174-5 = 仝9 9200+600 = 丄+h9-5+5=4 4404-6= 284-6 = 丄+J4 4734-9 = 1+1=307-49 =3 3654-7 = 4X6+3= 360X7 =65 + 8 = 25X4 = 999X0 = 800X7 = 83-9 = 50-23二95-48 = 28 + 6 = 260X4 = 28 三6= 50X9 = 63 三8 = 7X8+6 = 140 + 80 = 37+46 = 49X4~ 75-20 = 78 + 22 = 12 + 360 = 16X5 = 99+66 = 304-9 = 72*8 = 29+81 = 4204-7 = 208 X3~ 32+64 = 213X6~ 59X6~ 60+40 = 340X8 = 793 X6~ 30+66 = 654-8 = 82X7~ 28+68 = 309X8 = 260X4 = 18 + 71 = 800X5 = 608X5 = 40+56 =获取失败! 请刷M 文档投稿赚钱max,book11 xom79+81 = 800-235 = 620-470 = 706+94 = 540-160 = 320+480 = 900-187 = 170 + 350 = 50*7 =32 三6= 600X6 = 9X5+2= 274-5 = 1200X2 = 2X7+3= 554-6= 41X4~ 6X7+3= 444-7 = 29X6~ 5X6+5= 524-7 = 704X2~ 7X8+4= 37三6= 39X9~ 8X3+1= 454-6= 51X7~ 21X4 = 184-8 = 62X9~ 213X3 = 900X2 = 601X5 〜13X3 = 400X6 = 219X5~ 421X2 = 600X3 = 8X5+1= 43X2 =323X3 = 221X4 = 42X2 = 12X4= 23X3 = 232X3 = 25X3 = 120X8 = 40X5 = 36X2 = 165X6 = 840 + 70 = 24X3 = 23X5 = 21X5 = 12X7 = 62X3 = 210X5 = 224X3 = 29X7 = 450-80 = 27X3 = 15X3 = 300X8 = 15X6= 24X6 = 700X4 = 210X3 = 48X3 = 102X4 = 120X4 = 420X6 = 9X80 = 75X6= 250X7 = 123X3 = 42X7 = 205X7 = 39X7 = 23X9 = 50X4 = 79X5 =340X5 = 108X5 = 105X6 =25X4= 230X2 = 383+496" 809-394^ 218+502~ 982-491^ 413X6^ 296X3^ 804X5~ 195X7~ 180X6 = 105X6 = 908-379 =125X8 =500-392 =708X5 = 71一8 = 156X8= 80 + 70 =170 + 60 =160 + 50 = 65+ 23 = 490 +200= 40+120= 78 + 27 =588 + 430=60X80=870-800 =790-590800-350 =500-200 =960-60 =100-60 =900-683 =200-72 =40 + 50 =340 + 200 =100 + 80 =800-200 =350+400 = 370-150= 180 + 220 = 760-160 = 900-860= 835 + 75 = 200X6= 304-7 = 334-8 = 205X6= 2004X2 = 164-7 =99X2 = 700X9 = 274-6 = 99X3 = 524-6 = 384-9 =99X4 = 164-3 = 504-8 = 513+96 = 164-7 = 754-9 = 806X3 = 20*8 = 625X8 = 599+252 = 32*6 = 235 + 679~ 14X2 = 23*4 = 992 X3~ 30X6 = 3 31*5 = 504-318^ 500X8 = 84-3 = 306 X8~ 33X3 = 21*6 = 456+157~150X6= 23X3 = 705X9 = 324-5 = 55X4 = 689 X7~ 564-8 = 894-8 = 8324-6= 284-6 = 654-4 = 2764-3 = 269X4 = 764-2 = 3174-2 = 294+463 = 894-7 = 704-8 = 29 + 39 = 7804-4 = 7474-3 = 72 一9 = 67*4 = 474-3 = 240X5 = 37*6 = 7234-6 = 450-170 = 6544-4 = 8054-7 = 474-6 = 7084-9 = 68*3 = 374-4 = 4254-7 = 715*3 = 8364-5 = 2474-3 = 434-5= 437*6 = 96 — 9 = 4484-8 =9184-9 = 86 一5 = 644-8 = 6804-8 = 254-5 = 7204-9 = 964-4 = 93-25 = 25X4= 204-2 = 34+28 = 46+27 = 30004-3 = 67+33 = 27+54 = 40004-5 = 500X4 = 750+250 = 8404-2 = 92-16 = 80X7 = 964-3 = 52-18 = 300X5 = 2104-7 = 1200-700 = 4X40 = 3204-8 = 400-?8 = 85+25 = 50004-5 = 72一9 = 650-320 = 634-7 = 80-26 = 1400-500 = 86-39 = 53+69 = 73-29 = 400X8 = 43+36 = 300X5 =9000-500 = 64-26 = 34+56 =87-53 = 120+300 = 86-49 = 500X2 = 100-55 = 300X8 = 84+50 = 94-19 = 33-25 =62+48 = 600X6 = 54+28 = 72+19 = 700+900 = 67+23 = 700X4 = 74+28 = 600X4 = 660-90 = 72-48 = 824-9 =25+55 = 200X9 = 72-16 =40X7 = 47+35 = 52-28 = 4300-700 = 97-59 = 1200-800 = 86-24 = 2500*5 = 90-26 =45+37 = 64-16 = 250+50 = 60X5 = 56*7 = 500*5 =900-50二196-156 = 12004-5 = 73+69 = 240-80 = 24004-6 = 53+36 = 70X4= 814-6=25X4 = 55+90= 750-150 = 56+27 = 50X9 = 690+20 = 47+54 = 300 7200 — 9 = 120X4 =04-5 = 81004-9 = 200+60 = 750+150 = 800X5 = 4004-9 = 6X8+32 = 1104-3 = 3644-5 = 87-35 = 864-3 = 9384-2 = 56*8+4 = 154*8 = 3684-9 = 800-140 = 680*4 = 1344-4 = 500-250 = 3304-5 = 7884-9 = 30X7 = 4704-5 = 8854-2 =2034-8 = 18+53 = 38+69 = 184*8 = 29+32 = 83+62 = 37X50 = 14+56 = 12+98 = 27+46 = 72+76 = 17+84 =90+47 = 71+68 = 175+157 =18+15 = 39+79 = 645+239 =92+65 = 64+60 = 808+213 =70X5 = 2X90 = 70X4 = 50X9 = 8X80 = 7X80 = 10X8 = 60X3 = 4X80 = 7X30 = 50X4 = 90X4 = 2X0= 90X7 = 60X9 = 70X8 = 5X10 = 8X60 = 6X20 = 30X6 = 2X30 =9X70 = 5X24 =7X74= 4X89 = 5X60 = 9X71 = 49X7 = 79X3 = 11X2 = 8X47 =68X3 = 4X46 =82X4 = 9X65 = 4004-4 = 8X405 = 72X7 = 4204-3 = 945X6 = 56X6 = 8804-4= 520X3 = 6404-8 = 6504-5 = 7X21 = 840-?6 = 2704-3 = 88X5 = 5404-9 = 634-3 = 261X5 = 400*8 = 70*5 =2X523 = 900*9 = 22 — 2 = 5X460 = 4804-8 = 56*2 =6X20 = 3004-6 = 57*3 =904-5 = 914-7 = 75*3 = 784-3 = 384-2 = 724-2 = 334-3 = 30X10 = 394-6 = 4444-2 = 30X10 = 254-8 = 5764-6 = 40X20 = 664-9 = 390 一6 = 60X0 = 1804-3 = 69*7 = 10X30 = 200^8 = 1534-9 = 20X70 = 90X60 = 154 一8 = 80X50 = 60X55 = 36一9 = 30X70 = 31X60 = 1344-4 = 30X30 = 88X30 = 1844-8 = 40X60 = 60X100 = 70X40 = 60X50 = 50X86 = 70X80 = 50X50 = 90X60 =600X50= 60X200 = 30X26 = 100X30= 30X400 = 30X62 = 900X10= 90X500 = 88X40 = 400X60= 40X40 = 60X45 = 100X10 = 82X90 = 70X65 = 40X100 = 92X60 = 10X88 = 600X60 = 18X80 = 20X55 = 700X40 = 30X81 = 93X10 = 40X600 = 96X80 = 80X60 = 100X40 = 13X10 = 44X55 = 800X10 = 10X20 = 20X14 = 600X50 = 400X60 = 600X60 = 100X30 = 100X10 = 700X40 = 900X10 = 40X100 = 40X600 =100X40= 18X80 = 88X30 = 800X10= 30X81 = 60X45 = 60X200= 96X80 = 70X65 = 60X100= 50X86 = 18X88 = 30X400 = 13X10 = 44X55 = 90X500 = 10X20 = 22X14 = 40X40 = 30X26 = 41X60 = 82X90 = 30X62 = 60X55 = 92X60 = 88X40 = 31X60 = 6304-9 = 800-190 = 72 — 8 = 82-54 = 74+680 = 80-25 = 400-35 = 640一8 = 7204-9 = 6X50 = 54-30 = 354-7 = 56 + 38 = 70X6二81-48 =9X80 = 42 + 70 = 3004-6 = 65 + 55 = 60X9 = 3304-6 = 64+60 = 5X90 = 3604-6 =4X4= 5404-9 = 70X54 =3 + 56 = 829X0 = 60X32 = 64一8 = 60—22 = 25X24 = 1、用的面积单位有( )、(）、（),常用的测量土地的单位有(）、（)o2、8平方米=( )公顷=( )平方米3、20000平方米=( )公顷4、3平方千米=( )公顷=( )平方米13、小海是1994年6月1日出生的，到2004年6月1日，他是（）周岁。
人教版小学三年级下册数学口算天天练全套小学三年级数学口算天天练1.611-31=5802.890-870=203.516-191=3254.808-38=7705.967-702=2656.316-210=1067.483-465=188.840-479=3619.914-775=13910.933-137=79611.912-894=1812.删除此题13.27 + 46 = 7314.810 - 125 = 68515.92 + 65 = 15716.90 + 47 = 13717.18 + 15 = 3318.18 + 53 = 7119.29 + 32 = 6120.398 - 148 = 25021.256 + 775 = 103122.449 - 312 = 13723.202-155 = 4724.106 + 537 = 64325.916 + 861 = 177726.713 - 288 = 42527.954 - 286 = 66828.72 + 76 = 14829.71 + 68 = 13930.64-60 = 431.716 - 117 = 59932.766 + 792 = 155833.79-39 = 4034.84-17=6735.175 + 157 = 33236.38 + 69 = 10737.83-62 = 2138.12 + 98 = 11039.808 + 213 = 102140.704 - 124= 58041.607 + 914 = 152142.645-239=40643.648 - 585 = 6344.352 +708 = 106045.970 + 602 = 157246.860 - 162 = 69847.343 + 801 = 114448.806 + 487= 129349.691 + 400 = 109150.56-14=42班级姓名时间家长签字小学三年级数学口算天天练1.353 + 939 = 12922.802 - 668 = 1343.287 - 167 = 1204.859 - 371= 4885.941 - 343 = 5986.472 + 425 = 8977.900 - 168 = 7328.300+186= 4869.900 - 554 = 34610.800 - 200 = 60011.460 + 991 = 145112.700 - 666= 3413.300 - 122 = 17814.900 - 353 = 54715.500 - 162 = 33816.900 - 705= 195班级姓名时间家长签字1）25乘以4等于100. 2）30加700等于730.3）73减去30等于43.4）1400加1400等于2800.5）48除以4等于12.6）33加67等于100.7）40除以2等于20.8）3乘以1000等于3000.9）60除以6等于10.10）2乘以20加2等于42. 11）80乘以2乘以0等于0. 12）52除以4等于13.13）30乘以3加4等于94. 14）80除以5除以4等于4. 15）68减去19等于49.16）179减去79等于100.17）72除以9等于8.18）98加17减去36等于79. 19）30加15加30加15等于90. 20）84减去17等于67.21）100乘以3乘以3等于900. 22）20乘以4除以4等于20.23）11乘以2乘以5等于110. 24）455加695等于1150. 25）204减去191等于13. 26）224加944等于1168. 27）704加736等于1440. 28）285加691等于976. 29）300减去288等于12. 30）947减去236等于711. 31）1200减去400等于800. 32）120减去40等于80. 33）166减去120等于46. 34）727加517等于1244. 35）33乘以2等于66.36）332减去246等于86. 37）25加32等于57.38）73加26等于99.39）150加144等于294. 40）2乘以14等于28.41）1400减去800等于600. 42）320乘以3等于960.43）179减去79等于100. 44）792加192等于984. 45）544减去492等于52. 46）4乘以70等于280.47）65加35等于100.48）4乘以120等于480. 49）55减去37等于18.50）38减去19等于19.小学三年级数学口算天天练④1.1400 - 800 = 6005.65 + 35 = 1009.38 - 19 = 1913.73 - 30 = 4317.1780 ÷ 4 = 44521.60 × 3 = 18025.43 × 2 = 8629.60 ÷ 2 = 3033.300 - 254 = 4637.44 ÷ 4 = 11口算练题，小学三年级的孩子们要认真练哦。
