If 64 or any number is a multiple of 9, the digits will sum to a

来源: Lily3 于 2012-11-19 17:42:18 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (145 bytes)
回答: 三年级的数学怎么回答？ 由 jj33p 于 2012-11-19 16:54:46

If 64 or any number is a multiple of 9, the digits will sum to a multiple of 9.

6 + 4 = 10

not a multiple of 9. So 9 doesn't divide 64.

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• Or you can say that any multiple of 9 can be divided by 3. -2544- ♀ 给 2544 发送悄悄话 (0 bytes) () 11/19/2012 postreply 17:57:34

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