7.2乘以0.2加2.4乘以1.4的简便算法
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7.2乘以0.2加2.4乘以1.4的简便算法7.2乘以0.2加2.4乘以1.4的简便算法7.2乘以0.2加2.4乘以1.4的简便算法7.2乘以0.2加2.4乘以1.4=2.4×0.6+2.4×1.4=
7.2乘以0.2加2.4乘以1.4的简便算法
7.2乘以0.2加2.4乘以1.4的简便算法
7.2乘以0.2加2.4乘以1.4的简便算法
7.2乘以0.2加2.4乘以1.4
=2.4×0.6+2.4×1.4
=2.4×(0.6+1.4)
=2.4×2
=4.8
没有简便方法,
7.2×0.2+2.4×1.4
=2.4×3×0.2+2.4×1.4
=2.4×(0.6+1.4)
=2.4×2
=4.8
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