1.56×0.7+1.44×0.3用简便方法算
答案:1 悬赏:30 手机版
解决时间 2021-02-25 07:25
- 提问者网友：沦陷
- 2021-02-24 14:14
1.56×0.7+1.44×0.3用简便方法算
最佳答案
- 五星知识达人网友：傲气稳了全场
- 2021-02-24 15:45
1.56×0.7+1.44×0.3
=1.56×（1-0.3）+1.44×0.3
=1.56×1-1.56×0.3+1.44×0.3
=1.56-（1.56-1.44）×0.3
=1.56-0.12×0.3
=1.56-0.036
=1.524
=1.56×（1-0.3）+1.44×0.3
=1.56×1-1.56×0.3+1.44×0.3
=1.56-（1.56-1.44）×0.3
=1.56-0.12×0.3
=1.56-0.036
=1.524
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