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

=0.25X4X1.63
=6.3X10+0.63
=7.2X10-0.72