Ответ:
1)2/5+1/4=(8+5)/20
2)4/7+2/3=(12+14)/21
3)3/11+1/2=(6+11)/22
4)2/5+3/8=(16+15)/40
5)3/7+4/5=(15+28)/35
6)2/9+1/5=(10+9)/45
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Ответ:
1)2/5+1/4=(8+5)/20
2)4/7+2/3=(12+14)/21
3)3/11+1/2=(6+11)/22
4)2/5+3/8=(16+15)/40
5)3/7+4/5=(15+28)/35
6)2/9+1/5=(10+9)/45