简便方法计算，4.7✘0.3+0.47✘4.2+0.047怎么计算
答案:1 悬赏:60 手机版
解决时间 2021-01-24 16:57
- 提问者网友：沦陷
- 2021-01-23 20:43
简便方法计算，4.7✘0.3+0.47✘4.2+0.047怎么计算
最佳答案
- 五星知识达人网友：酒者煙囻
- 2021-01-23 21:21
4.7*0.3+0.47*4.2+0.047
=4.7*0.3+4.7*0.42+4.7*0.01
=4.7*(0.3+0.42+0.01)
=4.7*0.73
=(5-0.3)*0.73
=5*0.73-0.3*0.73
=3.65-0.219
=3.431
=4.7*0.3+4.7*0.42+4.7*0.01
=4.7*(0.3+0.42+0.01)
=4.7*0.73
=(5-0.3)*0.73
=5*0.73-0.3*0.73
=3.65-0.219
=3.431
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