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数学
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77+79+79+80+81+83+84 你会用简单一点的方法计算吗?
人气:241 ℃ 时间:2019-11-02 20:19:17
解答
79+81=80+80
77+83=80+80
79+84=80+80+3
所以总共是7个80再+3
得数为563
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计算:83+82+78+79+80+81+78+79+77+84.
计算:83+82+78+79+80+81+78+79+77+84.
77+78+79+80+81+82+83=
69+78+92+55+88+77+85+90+75+62+84+78+82+80+85+72+87+81+79+68+91+76+82+69=?
巧算题,83+82+78+79+80+81+78+79+77+84
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