18*3.14*15 9*9*3.14*2最简便方法
答案:1 悬赏:60 手机版
解决时间 2021-02-14 15:53
- 提问者网友：欲望失宠
- 2021-02-14 04:07
18*3.14*15 9*9*3.14*2最简便方法
最佳答案
- 五星知识达人网友：行路难
- 2021-02-14 05:13
18*3.14*15+9*9*3.14*2
=3.14x18x(15+9)
=3.14x20x24-3.14x2x24
=31.4x48-3.14x48
=31.4x50-31.4x2-3.14x50+3.14x2
=1570-62.8-157+6.28
=1576.28-219.8
=1576.28-220+0.2
=1356.48
=3.14x18x(15+9)
=3.14x20x24-3.14x2x24
=31.4x48-3.14x48
=31.4x50-31.4x2-3.14x50+3.14x2
=1570-62.8-157+6.28
=1576.28-219.8
=1576.28-220+0.2
=1356.48
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