四年级下册数学简便运算练习题附详解
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第 1 页 共 7 页 四年级下册简便运算练习题附详解
(1) 25×44
(2) 6.75+0.5-4.86
(3) 125×32×25
(4) (40+8)×125
(5) 11.91+8.59+20.09
(6) 6.74+12.62+24.38+3.26
(7) 13.59-6.91-0.09
(8) 415-176-24
(9) 425÷25+575÷25
(10) 4.64-2.36-1.64-0.24 (11) 30.65-(7.65+5.4)
(12) 19×96+96×81
(13) 435-(1300÷65+35)
(14) 23.4-8.54-1.46
(15) 87-2.123-0.877
(16) (125+9)×8
(17) 27×12-27×2
(18) 948+1061+52+939
(19) 25×5+74×5+5
(20) 1.29+3.7+0.71+6.3 第 2 页 共 7 页 (21) 74×53+47×74
(22) 794-198
(23) 12×(324-285)÷26
(24) 101×99
(25) 2.8+5.31+7.2+4.69
(26) 3.67×25×4
(27) 2.39+14.4+0.61
(28) 17×43-43×7
(29) 44.5×4+55.5×4
(30) 428×78+572×78 (31) 8.29+3.7+0.71+6.3
(32) 25×294×4
(33) 125×64
(34) 2169–642–358
(35) 44×25
(36) 530-475-25
(37) 6756-193-207
(38) 37+22+63+45
(39) 18×45+18×55
(40) 6.45-0.58-1.42 第 3 页 共 7 页 (41) 32×38+32×62
(42) 19×36–36×9
(43) 4000÷125÷8
(44) 8×(125×11)
(45) 125×89×8
(46) 64×99+64
(47) 72×125
(48) (100+4)×25
(49) 68×99
(50) 3200÷25÷4 (51) (320+280)÷50÷4
(52) 0.9+1.08+0.92+0.1
(53) 3.27+6.4+2.73+4.6
(54) 24×134-34×24
(55) 4900÷25÷4
(56) (339-67)×15÷24
(57) (125+7)×8
(58) (125+50)×8
(59) 437×27+27×563
(60) 72×125 第 4 页 共 7 页
四年级下册简便运算练习题答案
(1) 25×44
=25×4×11
=100×11
=1100
(2) 6.75+0.5-4.75
=6.75-4.75+0.5
=2.5
(3) 125×32×25
=125×8×4×25
=1000×100
=100000
(4) (40+8)×125
=6×8×125
=6×1000
=6000
(5) 11.91+8.59+20.09
=11.91+20.09+8.59
=32+8.59
=40.59
(6) 6.74+12.62+24.38+3.26
=(6.74+3.26)+(12.62+24.38)
=10+37
=47
(7) 13.59-6.91-0.09
=13.59-7
=6.59
(8) 415-176-24
=415-200
=215
(9) 425÷25+575÷25
=(425+575)÷25
=1000÷25
=40 (10) 4.64-2.36-1.64-0.24
=(4.64-1.64)-(2.36+0.24)
=3-2.6
=0.4
(11) 30.65-(7.65+5.4)
=30.65-7.65-5.4
=23-5.4
=17.6
(12) 19×96+96×81
=96×100
=9600
(13) 435-(1300÷65+35)
=435-(20+35)
=400-20
=380
(14) 23.4-8.54-1.46
=23.4-10
=13.4
(15) 87-2.123-0.877
=87-3
=84
(16) (125+9)×8
=125×8+9×8
=1000+72
=1072
(17) 27×12-27×2
=27×10
=270
(18) 948+1061+52+939
=(948+52)+(1061+939)
=1000+2000
=3000
(19) 25×5+74×5+5 第 5 页 共 7 页 =5×(25+74+1)
=500
(20) 1.29+3.7+0.71+6.3
=(1.29+0.71)+(3.7+6.3)
=2+10
=12
(21) 74×53+47×74
=21×100
=2100
(22) 794-198
=794-200+2
=596
(23) 12×(324-285)÷26
=12×39÷26
=12×3×13÷13÷2
=18
(24) 101×99
=100×99+99
=9999
(25) 2.8+5.31+7.2+4.69
=(2.8+7.2)+(5.31+4.69)
=10+10
=20
(26) 3.67×25×4
=3.67×100
=367
(27) 2.39+14.4+0.61
=2.39+0.61+14.4
=3+14.4
=17.4
(28) 17×43-43×7
=17×10
=170
(29) 44.5×4+55.5×4
=4×(44.5+55.5)
=400 (30) 428×78+572×78
=78×(428+572)
=78×1000
=78000
(31) 8.29+3.7+0.71+6.3
=(8.29+0.71)+(3.7+6.3)
=9+10
=19
(32) 25×294×4
=100×294
=29400
(33) 125×64
=125×8×8
=8000
(34) 2169–642–358
=2169-(642+358)
=1169
(35) 44×25
=11×4×25
=1100
(36) 530-475-25
=530-500
=30
(37) 6756-193-207
=6756-400
=6356
(38) 37+22+63+45
=(37+63)+22+45
=167
(39) 18×45+18×55
=18×100
=1800
(40) 6.45-0.58-1.42
=6.45-2
=4.45
(41) 32×38+32×62 第 6 页 共 7 页 =32×100
=3200
(42) 19×36–36×9
=36×10
=360
(43) 4000÷125÷8
=4000÷1000
=4
(44) 8×(125×11)
=8×125×11
=1000×11
=11000
(45) 125×89×8
=125×8×89
=89000
(46) 64×99+64
=64×100
=6400
(47) 72×125
=9×8×125
=9×1000
=9000
(48) (100+4)×25
=100×25+4×25
=2500+100
=2600
(49) 68×99
=68×100-68
=6800-68
=6732
(50) 3200÷25÷4
=3200÷100
=32
(51) (320+280)÷50÷4
=600÷200 =3
(52) 0.9+1.08+0.92+0.1
=(0.9+0.1)+(1.08+0.92)
=3
(53) 3.27+6.4+2.73+4.6
=(3.27+2.73)+(6.4+4.6)
=6+11
=17
(54) 24×134-34×24
=24×100
=2400
(55) 4900÷25÷4
=4900÷100
=49
(56) (339-67)×15÷24
=272×3×5÷3÷8
=272÷8×5
=34×5
=170
(57) (125+7)×8
=125×8+7×8
=1000+56
=1056
(58) (125+50)×8
=125×8+50×8
=1000+400
=1400
(59) 437×27+27×563
=27×1000
=27000
(60) 72×125
=9×8×125
=9×1000
=9000