Ответ:
-5/7
б)-2/4=-1/2
в)-6/11+8/11=2/11
2. а) 3/15-1/15=2/15
б)-3/6+4/6=1/6
в)-15/72+22/72=7/72
3.13/42-27/42=-14/42=-1/3
4.9/36+15/36-35/36=-11/36
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Ответ:
-5/7
б)-2/4=-1/2
в)-6/11+8/11=2/11
2. а) 3/15-1/15=2/15
б)-3/6+4/6=1/6
в)-15/72+22/72=7/72
3.13/42-27/42=-14/42=-1/3
4.9/36+15/36-35/36=-11/36