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5/8x3/4 1/4ⅹ5/8脱式计算,能简算的要简算

5/8x3/4 + 1/4ⅹ5/8 =(3/4 +1/4)×5/8 =5/8

5/19×3/8+3/8x14/19 =(5/19+14/19)x3/8 =1x3/8 =3/8

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