Question

8/15+7/12计算下面各题写出计算过程

用简便方法计算下面各题（写出简要的计算过程）．
8.8×12.5
1.7×99+1.7
1.25×2.5×4．

Answer 1

（1）8.8×12.5
=（8+0.8）×12.5
=8×12.5+0.8×12.5
=100+10
=110

（2）1.7×99+1.7
=1.7×（99+1）
=1.7×100
=170

（3）1.25×2.5×4
=1.25×（2.5×4）
=1.25×10
=12.5