4.28*5.3+0.572*53简算

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4.28*5.3+0.572*53简算4.28*5.3+0.572*53简算4.28*5.3+0.572*53简算4.28*5.3+0.572*53=4.28*5.3+5.72*5.3=(4.28+5

4.28*5.3+0.572*53简算
4.28*5.3+0.572*53简算

4.28*5.3+0.572*53简算
4.28*5.3+0.572*53
=4.28*5.3+5.72*5.3
=(4.28+5.72)*5.3
=10*5.3
=53