1.25*2.3*0.7简便算法
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/20 20:53:32
12.8x10.5÷7=12.8x(10.5÷7)=12.8×1.5=19.20.7÷1.25=0.7×8÷(1.25×8)=5.6÷10=0.56
1.25*0.7*0.9*0.8=(1.25*0.8)*(0.7*0.9)=1*0.63=0.63
52.8×0.45-0.45=52.8×0.45-0.45×1=(52.8-1)×0.45=51.8×0.45=23.3116×2.61×0.025×1.25=8×2×2.61×0.025×1.25=
1.25×7.3+1/8×37-12.5%×10=1.25×(7.3+3.7-1)=1.25×10=12.5注:1/8×37=0.125×37=1.25×3.7 12.5%×10=0.125×10
13/1.25=13÷1又4分之1=13×5分之4=5分之52=10又5分之2
0.7/1.25=70/125=(70x8)/(125x8)=560/1000=0.56
1.25*8.08=1.25*(8+0.08)=1.25*8+1.25*0.08=10+0.1=10.1
0.7÷1.25=(0.7×0.8)÷(1.25×0.8)=0.56÷1=0.56方法:利用商不变的性质
2.5×4×1.1×0.7=10×0.77=7.7
1.25x0.7x0.8=1.25x0.8x0.7=1x0.7=0.7再问:谢了
你这道题打错了原题应该是乘3.2原式=1.25*0.8*(2.5*4)=10
1.82×1.25+0.18×0.125=1.82×1.25+0.018×1.25=1.25×(1.82+0.018)=1.25×1.838=1.25×8×0.22975=2.2975
400÷1.25=40×1000÷125=40×(1000÷125)=40×8=320
等于4
1.25*88=1.25*(8*11)=(1.25*8)*11=10*11=110
1.25*0.8*0.7=0.7
0.7÷1.25=0.7÷10/8=0.7×8÷10=5.6÷10=0.56