4.05×0.3+4.6用简便方法
答案:2 悬赏:60 手机版
解决时间 2021-01-19 20:14
- 提问者网友:藍了天白赴美
- 2021-01-19 09:11
4.05×0.3+4.6用简便方法
最佳答案
- 五星知识达人网友:渡鹤影
- 2021-01-19 10:20
补充:4.05×0.3+4.6
=(4+0.05)×0.3+4.6 化整为零
=4×0.3+0.05×0.3+4.6 分解相乘
=1.2+0.015+4.6
=5.815追问10.8×0.9×0.5简便方法追答可以这样:
10.8×0.9×0.5
=10.8×0.5×0.9
=(10.8/2)×0.9
=5.4×0.9
=(5+0.4)×0.9
=5×0.9+0.4×0.9
=4.5+0.36
=4.86
有时候,最通常的解法往往是最简便的。
=(4+0.05)×0.3+4.6 化整为零
=4×0.3+0.05×0.3+4.6 分解相乘
=1.2+0.015+4.6
=5.815追问10.8×0.9×0.5简便方法追答可以这样:
10.8×0.9×0.5
=10.8×0.5×0.9
=(10.8/2)×0.9
=5.4×0.9
=(5+0.4)×0.9
=5×0.9+0.4×0.9
=4.5+0.36
=4.86
有时候,最通常的解法往往是最简便的。
全部回答
- 1楼网友:傲气稳了全场
- 2021-01-19 11:36
4.05×0.3+4.6
=1.215+4.6
=5.815追问10.8×0.9×0.5用简便方法追答10.8×0.9×0.5
=10.8x0.5x0.9
=5.4x(1-0.1)
=5.4x1-5.4x0.1
=5.4-0.54
=4.86
=1.215+4.6
=5.815追问10.8×0.9×0.5用简便方法追答10.8×0.9×0.5
=10.8x0.5x0.9
=5.4x(1-0.1)
=5.4x1-5.4x0.1
=5.4-0.54
=4.86
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