2.1+2.3+2.5+2.7++3.9怎么写
答案:1 悬赏:50 手机版
解决时间 2021-04-01 13:04
- 提问者网友：棒棒糖
- 2021-04-01 08:51
2.1+2.3+2.5+2.7++3.9怎么写
最佳答案
- 五星知识达人网友：想偏头吻你
- 2021-04-01 10:28
解
2.1+2.3+2.5+2.7++3.9
=2.1+2.9+（2.3+2.7）+2.5
=5+5+2.5
=12.5
2.1+2.3+2.5+2.7++3.9
=2.1+2.9+（2.3+2.7）+2.5
=5+5+2.5
=12.5
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