3.6*11.1+1.2*66.7=?简便算

问题描述:

3.6*11.1+1.2*66.7=?简便算

3.6*11.1+1.2*66.7
=1.2*33.3+1.2*66.7
=1.2*(33.3+66.7)
=1.2*100
=120