8.6×44+56×18.6巧算

分类: 作业答案 • 2021-12-31 10:34:30

问题描述：

8.6×44+56×18.6巧算

答

8.6×44+56×18.6
=8.6×44+56×(10+8.6)
=8.6×44+56×10+56×8.6
=8.6×(44+56)+560
=8.6×100+560
=1420