5.2·87.5+13.2·12.5简便运算
答案:1 悬赏:50 手机版
解决时间 2021-01-30 15:56
- 提问者网友:沉默的哀伤
- 2021-01-30 03:03
5.2·87.5+13.2·12.5简便运算
最佳答案
- 五星知识达人网友:平生事
- 2021-01-30 04:25
5.2×87.5+13.2×12.5
=5.2×7×12.5+(13.6-0.4)×12.5
=36.4×12.5+13.6×12.5-0.4×12.5
=(36.4+13.6)×12.5-5
=50×12.5-5
=625-5
=620
=5.2×7×12.5+(13.6-0.4)×12.5
=36.4×12.5+13.6×12.5-0.4×12.5
=(36.4+13.6)×12.5-5
=50×12.5-5
=625-5
=620
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