1.25×0.7+1.25×1.2+12.5=1.25×0.7+1.25×1.2+1.25x0.1=1.25x（0.7+1.2+0.1）=1.25x2=2.5有不明白的可以追问！谢谢！！祝学习进步
原式=1.25X0.7+1.25X1.2+1.25X10=1.25X(0.7+1.2+10)=1.25X11.9=14.875
