24.5+15.5乘1.2的简便计算
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24.5+15.5乘1.2的简便计算
24.5+15.5乘1.2
=24.5+15.5x1.2
=24.5+15.5x(1+0.2)
=24.5+15.5+3.1
=43.1
(24.5+15.5)x1.2
=(20+10)x1.2
=20x1.2+20x1.2
=48
24.5+15.5乘1.2
=24.5+15.5x1.2
=24.5+14.5x(1+0.2)
=24.5+15.5+2.9
=42.9