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9/25×17/26+13/25×7/26
人气:215 ℃ 时间:2020-05-20 20:26:38
解答
9/25×17/26+13/25×7/26
=(9*17+13*7)/(25*16)
=244/(25*16)
=4*61/(25*4*4)
=0.61
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