4.28*5.3+0.572*53简算

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

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

(0.428+0.572)*53=53 你觉得对不对,哈哈

还是很简单啊,呵呵
4.28*5.3+0.572*53=0.428*53+0.572*53=(0.428+0.572)*53=53