25*544*125 13*99使用简便方法怎么计算?
人气：475 ℃ 时间：2020-04-02 09:54:49
解答
25*544*125
=25*（4*8*17）*125
= （25*4）*（125*8）*17
=100*1 000*17
=1 700 000
13*99
=13*（100-1）
=13*100-13
=1300-13
=1287
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