括号8.5-5.7括号乘2.15+0.8巧算怎么做
答案:2 悬赏:20 手机版
解决时间 2021-02-20 20:23
- 提问者网友：原来太熟悉了会陌生
- 2021-02-20 01:23
括号8.5-5.7括号乘2.15+0.8巧算怎么做
最佳答案
- 五星知识达人网友：神鬼未生
- 2021-02-20 01:31
括号8.5-5.7括号乘2.15+0.8
=2.8x2.15+0.8
=(3-0.2)x2.15+0.8
=3x2.15-0.2x2.15+0.8
=6.45-0.43+0.8
=6.02+0.8
=6.82
=2.8x2.15+0.8
=(3-0.2)x2.15+0.8
=3x2.15-0.2x2.15+0.8
=6.45-0.43+0.8
=6.02+0.8
=6.82
全部回答
- 1楼网友：拾荒鲤
- 2021-02-20 02:52
(8.5-5.7)×2.15+0.8
=(8.5-5.5-0.2)×2.15+0.8
=(3-0.2)×2.15+0.8
=3×2.15-0.2×2.15+0.8
=6.45-0.43+0.8
=6.02+0.8
=6.82
=(8.5-5.5-0.2)×2.15+0.8
=(3-0.2)×2.15+0.8
=3×2.15-0.2×2.15+0.8
=6.45-0.43+0.8
=6.02+0.8
=6.82
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