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4.8×1.1+5.56×1.2简算

4.8×1.1+5.56×1.2 =6×0.8×1.1+5.56×6×0.2 =6×(0.8×1.1+5.56×0.2) =6×(0.88+1.112) =6×1.992 =11.952

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