101*502-502 这样简算
99*327-327可以简算吗？
人气：406 ℃ 时间：2020-05-18 16:15:40
解答
化简
101*502-502
=（101-1）*502
=100*502
=50200
99*327-327
=(99-1)*327
=(100-2)*327
=100*327-2*327
=32700-654
=32046
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