简便计算:156+6.2-15.6+6.2和43×102
问题描述:
简便计算:156+6.2-15.6+6.2和43×102
答
156+(6.2+6.2)-15.6
=156-(15.6-12.4)
=156-3.2
=152.8
43*102
=43*100+43*2
=4300+86
=4386