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Scrie intregii sub forma de fractie apoi calculeaza :1-3/6 ;2-5/2 = :;2-3/9

Răspuns :

1-3/6=6/6-3/6=3/6
2-5/2=2/2+2/2-2/2-2/2-1/2=-1/2
2-3/9=3/9+3/9-3/9=3/9