如题所述
7/9+6/4-9/7
=7/9+3/2-9/7
=7*14/9*14+3*63/2*63-9*18/7*18
=98/126+189/126-162/126
=287/126-162/126
=125/126
=7/9+3/2-9/7
=7*14/9*14+3*63/2*63-9*18/7*18
=98/126+189/126-162/126
=287/126-162/126
=125/126
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第1个回答 2013-07-22
7/9+6/4-9/7=追问
能多一点么
追答2/1+5/6+9/4-8/3=
2/1-3/2+6/8=
9/9-8/1+7/5=
