四点零五×9点九的简便运算
答案:3 悬赏:60 手机版
解决时间 2021-11-17 04:31
- 提问者网友:我的未来我做主
- 2021-11-16 19:22
四点零五×9点九的简便运算
最佳答案
- 五星知识达人网友:神的生死簿
- 2021-11-16 20:06
40.095
解析:
4.05×9.9
=4.05×(10-0.1)
=4.05×10-4.05×0.1
=40.5-0.405
=40.095
解析:
4.05×9.9
=4.05×(10-0.1)
=4.05×10-4.05×0.1
=40.5-0.405
=40.095
全部回答
- 1楼网友:撞了怀
- 2021-11-16 21:37
四点零五×9点九的简便运算
解:根据凑整法和分配律的简便方法,
原式=4.05x9.9
=4.05x(10-0.1)
=4.05x10-4.05x0.1
=40.05-0.405
=39.645
解:根据凑整法和分配律的简便方法,
原式=4.05x9.9
=4.05x(10-0.1)
=4.05x10-4.05x0.1
=40.05-0.405
=39.645
- 2楼网友:旧脸谱
- 2021-11-16 20:19
4.05×9.9
=4.05×(10-0.1)
=4.05×10-4.05×0.1
=40.5-0.405
=40.195追答4.05×9.9
=4.05×(10-0.1)
=4.05×10-4.05×0.1
=40.5-0.405
=40.095不好意思,急中出错,40.095是对的~
=4.05×(10-0.1)
=4.05×10-4.05×0.1
=40.5-0.405
=40.195追答4.05×9.9
=4.05×(10-0.1)
=4.05×10-4.05×0.1
=40.5-0.405
=40.095不好意思,急中出错,40.095是对的~
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