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7分之5乘3分之1加7分之2除3 = = = 24.8除5分之2乘4分之1 = = =
人气:226 ℃ 时间:2020-04-21 08:00:44
解答
7分之5乘3分之1加7分之2除3
=5/7x1/3+2/7x1/3
=1/3x(5/7+2/7)
=1/3
24.8除5分之2乘4分之1
=24.8x5/2x1/4
=62x1/4
=15.5
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