7.9+0.1-7.9+0.1用简便方法计算

Question

如题所述

Answer 1

=(7.9-7.9)+(0.1+0.1)
=0+0.2
=0.2

Answer 2

（7.9-7.9）+（0.1+0.1）
=0+0.2
0.2本回答被网友采纳

Answer 3

7.9+0.1-7.9+0.1
=（7.9-7.9）+（0.1+0.1）
=0+0.2
=0.2本回答被网友采纳