3.9×0.29+6.1×0.42的简便运算
答案:1 悬赏:40 手机版
解决时间 2021-01-08 17:45
- 提问者网友：暗中人
- 2021-01-08 00:02
3.9×0.29+6.1×0.42的简便运算
最佳答案
- 五星知识达人网友：痴妹与他
- 2021-01-08 00:47
3.9X0.29+6.1X0.42
=10X0.29-6.1X0.29+6.1X0.42
=2.9+6.1X(0.42-0.29)
=2.9+6.1X0.13
=2.9+6.1X0.1+6.1X0.03
=2.9+0.61+0.183
=2.9+0.793
=3.693
=10X0.29-6.1X0.29+6.1X0.42
=2.9+6.1X(0.42-0.29)
=2.9+6.1X0.13
=2.9+6.1X0.1+6.1X0.03
=2.9+0.61+0.183
=2.9+0.793
=3.693
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