5/(14)[7/3*(9/(14)-2/7)]
3个回答
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5/14[7/3x(9/14一2/7)]
=5/14x7/3ⅹ(9/14一4/14)
=5/6x5/14
=25/84。
=5/14x7/3ⅹ(9/14一4/14)
=5/6x5/14
=25/84。
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5/14×[7/3×(9/14-2/7)]
=5/14×[7/3×9/14-7/3×2/7]
=5/14×[3/2-2/3]
=5/14×3/2-5/14×2/3
=15/28-5/21
=45/84-20/84
=25/84
=5/14×[7/3×9/14-7/3×2/7]
=5/14×[3/2-2/3]
=5/14×3/2-5/14×2/3
=15/28-5/21
=45/84-20/84
=25/84
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展开全部
/14×[7/3×(9/14-2/7)]
=5/14×[7/3×9/14-7/3×2/7]
=5/14×[3/2-2/3]
=5/14×3/2-5/14×2/3
=15/28-5/21
=45/84-20/84
=25/84
=5/14×[7/3×9/14-7/3×2/7]
=5/14×[3/2-2/3]
=5/14×3/2-5/14×2/3
=15/28-5/21
=45/84-20/84
=25/84
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