7/15×3/8+1/15×7/16+1/15×3又1/2用简便算法怎么做？
答案:3 悬赏:30 手机版
解决时间 2021-02-22 15:49
- 提问者网友：鼻尖触碰
- 2021-02-21 18:32
7/15×3/8+1/15×7/16+1/15×3又1/2用简便算法怎么做？
最佳答案
- 五星知识达人网友：由着我着迷
- 2021-02-21 19:41
7/15×3/8+1/15×7/16+1/15×3又1/2
= 7/15×3/8+7/15×1/16+1/15×7/2
= 7/15×3/8+7/15×1/16+7/15×1/2
=7/15×(3/8+1/16+1/2)
=7/15×15/16
=7/16
= 7/15×3/8+7/15×1/16+1/15×7/2
= 7/15×3/8+7/15×1/16+7/15×1/2
=7/15×(3/8+1/16+1/2)
=7/15×15/16
=7/16
全部回答
- 1楼网友：一叶十三刺
- 2021-02-21 22:11
先把1/15乘了再说
- 2楼网友：未来江山和你
- 2021-02-21 20:53
原式=7/15×3/8+1/15×7/16+1/15×7/2=7/15（3/8+1/16+1/2）=7/15×15/16=7/16
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