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25乘(56加72)乘125怎么巧算
人气:417 ℃ 时间:2020-04-11 15:22:31
解答
25x(56+72)x125
=25x128x125
=25x4x4x8x125
=(25x4)x4x(8x125)
=100x4x1000
=400x1000
=400000
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