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if a man has 70 and gives 60 to a friend how much will be left

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解答

lcm 70,60

解答

420
求解步骤
70,60
70质因数分解:2⋅5⋅7
60质因数分解:2⋅2⋅3⋅5
将每个因子乘以它在 70 或 60中出现的最多次数=2⋅2⋅5⋅7⋅3
数字相乘:2⋅2⋅5⋅7⋅3=420=420

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