0.25×1.25＋2.5×0.075简便方法运算

0.25×1.25＋2.5×0.075=0.25×1.25＋0.25×0.75=0.25×(1.25+0.75)=0.25×2=0.5我还是不懂怎么都变成2.5了0.25=2.5×0.12.5=0.25×10所以0.25×1.25＋2.5×0.075=0.25×1.25＋0.25×0.75或者0.25×1.25＋2.5×0.075=2.5×0.125＋2.5×0.075