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5.6x69.32+138.64x0.05+693.2x0.43用简便算法
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5.6x69.32+138.64x0.05+693.2x0.43用简便算法
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5.6x69.32+138.64x0.05+693.2x0.43
=5.6x69.32+69.32x0.1+69.32x4.3
=69.32x(5.6+0.1+4.3)
=69.32x10
=693.2
=5.6x69.32+69.32x0.1+69.32x4.3
=69.32x(5.6+0.1+4.3)
=69.32x10
=693.2
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