用简便方法7.28×0.1＋0.5×7.28+0.049×728
答案:1 悬赏:50 手机版
解决时间 2021-02-09 09:14
- 提问者网友：黑米和小志
- 2021-02-09 00:25
用简便方法7.28×0.1＋0.5×7.28+0.049×728
最佳答案
- 五星知识达人网友：污到你湿
- 2021-02-09 01:08
7.28×0.1＋0.5×7.28+0.049×728
=7.28×0.1＋0.5×7.28+4.9×7.28
=7.28×(0.1＋0.5+4.9)
=7.28×(0.5+5)
=7.28×0.5+7.28×5
=3.64+36.4
=40.04
=7.28×0.1＋0.5×7.28+4.9×7.28
=7.28×(0.1＋0.5+4.9)
=7.28×(0.5+5)
=7.28×0.5+7.28×5
=3.64+36.4
=40.04
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