四年级小数简便运算及答案

•=30.16－8
•=1×4.78
•=1×2.5－0.02×2.5
•=22.16
•=4.78
•=2.5－0.05
•=2.45
•0.25×7×3.6
1.25×13×1.6
10.2×0.41
••••====0016.×..232755×××074.××9(74××00..99）••••====1112..0622×551××318×3×0×1.(328××00.2.2）••••====144(0..111×0+80+02.0.4.0128+2）0×.20×.401.41
28.7×1.6÷28.7
•= 28.7÷28.7×1.6 •=1×1.6 •=1.6
•11÷0.25－10÷0.25 •=(11 －10)÷0.25 •=1÷0.25 •=4
•7.8×(1.001÷0.26)×0.26 •=7.8×1.001×(0.26÷0.26) •=7.8×1.001 •=7.8078
•100×9.5×0.98+9.5×2 •=100×0.98×9.5+9.5× 2 •=9.5×(98+2） •=9.5×100 •=950
(80+5.6)÷8 •=80÷8+5.6÷8 •=10+0.7 •=10.7
3.5+17.8×99+14.3 •=(3.5+14.3)+17.8×99 •=17.8×(1+99） •=17.8×100 •=1780
310÷2.5÷4
•=28.7÷(0.7×0.5）•=310÷(2.5×4）
•=28.7÷0.7÷0.5 •=310÷10
•=41÷0.5
•=31
•=82
11.2÷ 9.6×2.4 •=11.2÷(9.6÷2.4） •=11.2÷4 •=2.8
•560÷(140÷8)
•=560÷140×8 •=4×8 •=32
•=1.62÷10
•=0.162
•0.38×7.6+0.38÷2.5+0.38×2 36×2.54+1.8×49.2
来自百度文库
•=0.38×7.6+0.38×0.4+0.38×2 •=1.8×20×2.54+1.8×49.2
•=0.38×(7.6+0.4+2)
•=1.8×(20×2.54)+1.8×49.
•=0.38×10
四年级小数简便运算及 答案
2020年6月6日星期六
•67.68－7.3－2.7
•=67.68－(7.3+2.7) •=67.68－10 •=57.68
3.65－1.28－0.37－1.77
•=3.65－(1.28+0.37) －1.77 •=3.65－1.65 －1.77 •=0.23
•19.826－1.173－5.248－3.405
28×11.11+99.99×8 •=28×11.11+11.11×9×8 •=28×11.11+11.11×(9×8) •=11.11×(28+72） •=11.11×100 •=1111
•7.6×18+2.3×2.4
1.62÷8÷(3.62－2.37) •=1.62÷8÷1.25
•=1.62÷(8×1.25）
42×67+4.2×330
•=2.5×12.5×(8×4） •=42×67+42×33
•=(2.5×4)×(12.5×8)•=42×(67+33）
•=10×100
•=42×100
•=1000
•=4200
8.37×16÷8
•=8.37×(16÷8） •=8.37×2 •=16.74
•28.7÷0.35
•=31.97－0.3
•=20+6.78
•=31.67
•=26.78
31.61－21.27－1.61 •=31.61－1.61 －21.27 •=30－21.27 •=8.73
•27.64－(5.79+1.64) •=27.64－1.64 －5.79 •=26－5.79 •=20.21
23.12－(10.12－3.67) •=23.12－10.12+3.67 •=13+3.67 •=16.67
•20.65－(17.1－1.35)
•=20.65+1.35－17.1 •=22－17.1 •=4.9
32.75+(15.25－10.68) •=32.75+15.25－10.68 •=48－10.68 •=37.32
•30.16－23.28+15.28
0.25×4.78×4
0.98×2.5
•=30. 16－(23.28－15.28)•=0.25×4×4.78 •= (1－0.02) ×2.5
•=19.826－(1.173+5.248+3.405 ) •=19.826－9.826 •=10
130.8－35.9+5.9
•=130. 8－(35.9－5.9) •=130.8－30 •=100.8
•23.97+0.9+6.8 23.9+6.78－3.9
•=23.97+1+ 7－0.3 •=23.9－3.9+6.78
2
•=3.8
•=1.8×(50.8+49.2)
•1994+199.4+19.94+1.994
•=1.8×100
•=2000+200+20+2－6－0.6－0.06－•0=.108006
•=2222－6.666 •=2215.334
•0.7+2×1.4+2.1+2×0.7 •=0.7×1+(2×2)×0.7+0.7×3+2×0. 7
5.6×7÷4 91÷0.125
•=5.6÷4×7 •=(91×8)÷(0.125×8）
•=1.4×7
•=728÷1
•=9.8
•=728
•2.38×4.1+5.8×2.38+0.238 •=2.38×4.1+5.8×2.38+2.38×0.1 •=2.38 ×(4.1+5.8+0.1） •=2.38×10 •=23.8
•4.52×0.45+5.48×0.45 •=(4.52+5.48）×0.45 •=10×0.45 •=4.5
42×3.9
•= 42×(4－0.1） •=42×4－42×0.1 •=168－4.2 •=163.8
1.4×99+1.4 •=1.4×(99+1） •=1.4×100 •=140
•2.5×12.5×32
•=0.7×(1+4+3+2)
•=0.7×10
•=7
•(0.375×101－37.5)÷37.5 •=0.375×(101－1)÷37.5 •=0.375×100÷37.5 •=37.5÷37.5 •=1