5.6×69.32+138.64×0.05+693.2×0.43等于几 怎样算更简便?急用

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5.6×69.32+138.64×0.05+693.2×0.43等于几 怎样算更简便?急用
5.6×69.32+138.64×0.05+693.2×0.43等于几 怎样算更简便?
急用

5.6×69.32+138.64×0.05+693.2×0.43等于几 怎样算更简便?急用
69.32*(5.6+0.2+4.3)=69.32(10+0.1)

5.6x69.32+138.64x0.05+693.2x0.43
=5.6x69.32+69.32x2x0.05+69.32x10x0.43
=69.32x(5.6+2x0.05+10x0.43)
=69.32x10
=693.2