简便计算, 25x4,125x8,25x16,25x48

简便计算, 25x4,125x8,25x16,25x48

25x4=100;

125x8=1000;

25x16
=25x4x4
=100x4
=400;

25x48
=25x4x12
=100x12
=1200.

供参考。
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第1个回答  2016-04-25
简便计算, 25x4=100,
125x8=1000
25x16=25x4x4=100x4=400
25x48=25x4x12=100x12=1200