五上数学小数乘除法简便计算

五上数学小数乘除法简便计算0.56×8.5+5.6×0.15=5.6×0.85+5.6×0.15=5.6×(0.85+0.15)=5.6×1=5.6128÷0.125÷80=128÷(0.125×80)=128÷10=12.82.6×7÷2.6×7=2.6÷2.6×7×7=1×7×7=490.25×3.2×12.5=0.25×(4×0.8)×12.5=(0.25×4)×(0.8×12.5)=1×10=105.6×1.4÷7=5.6÷7×1.4=0.8×1.4=1.1252.34÷2.5÷4=52.34÷(2.5×4)=52.34÷10=5.2347.35÷(7.35×0.25)=7.35÷7.35÷0.25=1÷0.25=40.72÷0.5÷0.9=0.72÷0.9÷0.5=0.8÷0.5=1.65.6×9.8÷4.9=5.6×(9.8÷4.9)=5.6×2=11.26.45÷0.7+7.55÷0.7=(6.45+7.55)÷0.7=14÷0.7=200.75×18÷0.15=0.75÷0.15×18=5×18=907.45÷0.25÷8=7.45÷(0.25×8)=7.45÷2=3.725(8.1+0.72÷0.9)=8.1÷0.9+0.72÷0.9=9+0.8=9.812.5×7.2÷0.9=12.5×(7.2÷0.9)=12.5×8=100(4.8-0.36)÷0.6=4.8÷0.6-0.36÷0.6=8-0.6=7.4五上数学小数乘除法简便计算61.5×102=61.5×(100+2)=61.5×100+61.5×2=6150+123=62730.59×99=0.59×(100-1)=0.59×100-0.59×1=59-0.59=58.419.99×0.8+1.11×2.8=1.11×9×0.8+1.11×2.8=1.11×7.2+1.11×2.8=1.11×(7.2+2.8)=1.11×10=11.110.1×27=(10+0.1)×27=10×27+0.1×27=270+2.7=272.738.2×0.28+3.82×6.1+0.382×11=3.82×2.8+3.82×6.1+3.82×1.1=3.82×(2.8+6.1+1.1)=3.82×10=38.22.9×0.45+0.29×5.5=2.9×0.45+2.9×0.55=2.9×(0.45+0.55)=2.9×1=2.93.58×67+35.8×3.7-0.358×40=3.58×67+3.58×37-3.58×4=3.58×(67+37-4)=3.58×100=3589.8×4.8+0.96=9.8×4.8+4.8×0.2=4.8×(9.8+0.2)=4.8×10=48五上数学小数乘除法简便计算(12.5-0.25)×0.4=12.5×0.4-0.25×0.4=5-0.1=4.912.5÷(12.5×0.4)=12.5÷12.5÷0.4=1÷0.4=2.53.5×7.2÷3.5×7.2=3.5÷3.5×7.2×7.2=1×7.2×7.2=51.8412×9.7+3.6=12×9.7+12×0.3=12×(9.7+0.3)=12×10=1201.25×8.8=1.25×(8+0.8)=1.25×8+1.25×0.8=10+1=114.8×10.1=4.8×(10+0.1)=4.8×10+4.8×0.1=48+0.48=48.48810÷5.4=810÷(0.9×6)=810÷0.9÷6=900÷6=1503.6×9.9=3.6×(10-0.1)=3.6×10-3.6×0.1=36-0.36=35.646.3×9+6.3=6.3×9+6.3×1=6.3×(9+1)=6.3×10=63(3.2+5.6)÷0.8=3.2÷0.8+5.6÷0.8=4+7=117.2×4.5+2.8×4.5=4.5×(7.2+2.8)=4.5×10=458.4×1.25÷0.7=8.4÷0.7×1.25=12×1.25=157.8÷0.125=(7.8×8)÷(0.125×8)=62.4÷1=62.42.5×(4+0.8)=2.5×4+2.5×0.8=10+2=125.6÷0.25÷4=5.6÷(0.25×4)=5.6÷1=5.6五上数学小数乘除法简便计算0.25×32×1.25=0.25×(4×8)×1.25=(0.25×4)×(8×1.25)=1×10=100.78×102=0.78×(100+2)=0.78×100+0.78×2=78+1.56=79.567.5×101-7.5=7.5×101-7.5×1=7.5×(101-1)=7.5×100=7500.42×3.7+4.2×0.63=4.2×0.37+4.2×0.63=4.2×(0.37+0.63)=4.2×1=4.25.4×99+5.4=5.4×99+5.4×1=5.4×(99+1)=5.4×100=54015÷0.125÷8=15÷(0.125×8)=15÷1=156.4×12.5×0.25=(8×0.8)×12.5×0.25=(8×12.5)×(0.8×0.25)=100×0.2=20(8-0.8)×1.25=8×1.25-0.8×1.25=10-1=99.6÷(4.8÷0.5)=9.6÷4.8×0.5=2×0.5=13.2×0.45+0.32×5.5=3.2×0.45+3.2×0.55=3.2×(0.45+0.55)=3.2×1=3.20.125×4.8=0.125×(8×0.6)=(0.125×8)×0.6=1×0.6=0.62.7+2.7×99=2.7×1+2.7×99=2.7×(1+99)=