1.5×4.2-0.75÷0.25的简便计算

问题描述:

1.5×4.2-0.75÷0.25的简便计算

1.5*4.2-0.75÷0.25
=1.5*2*2.1-3
=3*2.1-3
=6.3-3
=3.3