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calculati;va rog mullt:
7/12+2/3=
1/4+5/7=
13/18+5/12=
5/6+1/24=
1/3+1/5= 
7/18+2/15=


Răspuns :

7/12+2/3=7/12+8/12=15/12
1/4+5/7=7/28+20/28=27/28
13/18+5/12=26/36+15/36=41/36
5/6+1/24=20/24+1/24=21/24
1/3+1/5=5/15+3/15=8/15
7/18+2/15=35/90+12/90=47/90