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数学
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77+123×24求简便计算,
人气:477 ℃ 时间:2020-02-15 08:48:23
解答
77+123×24
=77+(125-2)x8x3
=77+125x8x3-2x8x3
=77+3000-48
=77-48+3000
=3029
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