简便计算, 25x4,125x8,25x16,25x48
25x4=100ï¼
125x8=1000ï¼
25x16
=25x4x4
=100x4
=400;
25x48
=25x4x12
=100x12
=1200.
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125x8=1000ï¼
25x16
=25x4x4
=100x4
=400;
25x48
=25x4x12
=100x12
=1200.
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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
125x8=1000
25x16=25x4x4=100x4=400
25x48=25x4x12=100x12=1200