3.8X2.74-1.7X3又5分之4+1.04×1.2
=3.8×2.74-1.7×3.8﹢1.04×1.2
=3.8×1.04﹢1.04×1.2
=5×1.04
=5.2
3.8乘2.74减1.7乘3又5分之4加1.04乘1.2简便计算
3.8乘2.74减1.7乘3又5分之4加1.04乘1.2简便计算
数学人气:158 ℃时间:2020-01-30 17:02:03
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