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Efectuați 5/3 + 1/4 b 3/5 + 5/4 7/10 + 4/15 PG 137 DIN AUXILIAR ​

Răspuns :

Răspuns:

5/3  +  1/4  = (5x4 + 3)/12 = 23/12 = 1 intreg 11/12

3/5  +  5/4 = (3x4 + 5x5)/20 = (12+25)/20 = 37/20 = 1 intreg 17/20

7/10   +  4/15 = (7x3 + 4x2)/30 = (21+8)/30 = 29/30