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calculati a) 2/6+3/10= b) 2/9+2/3= c) 3/4+5/8= e) 1/2+1/4= f) 3/10+2/5 = g) 1/6+2/3= h) 3/5+2/20= va roooggggg e urgent cat puteti dau coroana!!!!!​