Question

8.1+8.2+8.3+8.4+8.5的简便计算？

Answer 1

简便计算过程如下：

1、提取原式：8.1+8.2+8.3+8.4+8.5

2、计算过程：

      =（8.1+8.4）+（8.2+8.3）+8.5

      =16.5+16.5+8.5

      =33+8.5

      =41.5

3、计算结果：41.5

Answer 2

解:简便计算过程如下
8.1+8.2+8.3+8.4+8.5
＝8+0.1+8+0.2+8+0.3+8+0.4+8+0.5
＝8×5+（0.1+0.4）+（0.2+0.3）+0.5
＝40+0.5+0.5+0.5
＝40+0.5×3
＝40+1.5
＝41.5

Answer 3

8.1+8.2+8.3+8.4+8.5
=(8.1+0.2)+(8.2+0.1)+8.3+(8.4-0.1)+(8.5-0.2)
=8.3+8.3+8.3+8.3+8.3
=8.3×5
=41.5