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77×0.16÷7.7×12.5 怎么简便运算?
人气:346 ℃ 时间:2020-04-16 02:09:40
解答
77×0.16÷7.7×12.5
=77÷7.7×0.16×12.5
=10×0.2×0.8×12.5
=2×10=20
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