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
答
1.5×4.2-0.75÷0.25=1.5*4+1.5*0.2-3=6.3-3=3.3
答
1.5*4.2-0.75÷0.25
=1.5*2*2.1-3
=3*2.1-3
=6.3-3
=3.3