小学奥数数论问题位值原理练习题(六)(2)
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2017-05-25 19:29:04
解答:组成六个数之和为:10a+b+10a+c+10b+a+10b+c+10c+a+10c+b
=22a+22b+22c
=22(a+b+c)
很显然,是22倍
解答:组成六个数之和为:10a+b+10a+c+10b+a+10b+c+10c+a+10c+b
=22a+22b+22c
=22(a+b+c)
很显然,是22倍