0.32×4.5+0.45×6.8+4.5简便运算

问题描述:

0.32×4.5+0.45×6.8+4.5简便运算

0.32×4.5+0.45×6.8+4.5
=0.32×4.5+4.5×0.68+4.5
=4.5×(0.32+0.68+1)
=4.5×2
=9