如题所述
7/5×2/3+14/15÷1/9
=14/15+14/15×9
=14/15×(9+1)
=14/15×10
=28/3
=9又1/3
=14/15+14/15×9
=14/15×(9+1)
=14/15×10
=28/3
=9又1/3
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第1个回答 2015-06-08
14/15×(1+9)