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1.25x48的简便运算

1.25X48*0.25用简便方法计算=1.25x8x6x0.25=(1.25x8)x(6x0.25)=10x1.5=15

1.25x48=1.25x8x6=10x6=60

1.25X48=1.25x40+1.25x8=50+10=60

简便算法么?一:1.25*8*6=10*6=60 二:1.25*(40+8)=1.25*40+1.25*8=50+10=60 三:(1+0.25)*4*12=(4+1)*12=5*12=60

1.25X48 解:原式=1.25*8*6=10*6=603.18X3.6+3.18X3.6 解:原式=3.18*3.6*2=22.8967.2乘10.1 解:原式=7.2*(10+0.1)=7.2*10+7.2*0.1=72+0.72=72.72 解方程:0.7(3+*)=2.8 解:可化为3+x=4 x=15.2x-x=29.4 解:可化为4.2x=29.4 x=7 望采纳

1.6x7.5x1.25=0.8*2x7.5x1.25=(0.8x1.25)*(2x7.5)=1*15=15

1.25*1.6=1.25*4*0.4=5*0.4=2

1.25x49-1.25 =1.25*(49-1) =1.25*48 =1.25*8*6 =10*6 =60 请点采纳谢谢

1.6*7.5*1.25=2*0.8*7.5*1.25=(2*7.5)*(0.8*1.25)=15*1=15

1.25x102=1.25*(100+2)=1.25*100+1.25*2=125+2.5=127.5

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