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1. Efectuati adunarile : a) 3/5+2/5 b) 37/53+69/53 c) 17/40+3/40 d) 93/137+44/137 . ele sun fractii ordinare cu acelasi numitor .

Răspuns :

3/5+2/5-5/5=1
37/53+69/53=106/53=2
17/40+3/40=20/40=1/2
93/137+44/137=137/137=1