0.125×8+1.25×2.2+12.5×0.7=1.25×0.8+1.25×2.2+1.25×7=1.25×(0.8+2.2+7)=1.25×10=12.5
解:0.125x8+1.25x2.2+12.5x0.7=12.5x0.08+12.5x0.22+12.5x0.7=12.5x(0.08+0.22+0.7)=12.5x1=12.5
0.125x8+1.25x2.2+12.5x0.7=1+2.75+8.75=12.5