1.25x6.4+0.125x36,简便计算。=1.25x6.4+1.25x3.6=1.25x（6.4+3.6）=1.25x10=12.5
1.25×6.4=1.25×(8×0.8)=1.25×8×0.8=10×0.8=80.125×36=0.125×4×9=0.5×9=4.5
原式=1.25×（6.4+3.6）=1.25×10=12.5
看下面的解
图望采纳
