2/7x60%+3/5x5/7简算

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2/7x60%+3/5x5/7简算2/7x60%+3/5x5/7简算2/7x60%+3/5x5/7简算2/7x3/5+3/5x5/7=3/5x(2/7+5/7)=3/5

2/7x60%+3/5x5/7简算
2/7x60%+3/5x5/7简算

2/7x60%+3/5x5/7简算
2/7x3/5+3/5x5/7=3/5x(2/7+5/7)=3/5