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1) 1/2 + 1/3
2)37/7 + 12/15
3) 2/7 + 9/2
4) 6/4 + 3/5
5)4/5 + 61/2
restas :
1)2/3 - 5/6
2) 8/7 - 9/5
3) 1/6 - 2/3
4) 4/9 - 7/8
5) 79/97 - 56/21