8.7-3.7x0.5简便运算怎么算 0.7x0.25x0.45怎样简算?
0.7x0.25x0.45怎样简算?可以这样算:0.7*0.25*0.450.7*0.25*(0.4 0.05)0.7*0.25*0.4 0.7*0.25*0.