0.25乘1.63乘4和6.3乘10.1还有7.2乘9.9的简算
问题描述:
0.25乘1.63乘4和6.3乘10.1还有7.2乘9.9的简算
答
=0.25X4X1.63
=6.3X10+0.63
=7.2X10-0.72