Question

Efectuati calculele : 2/7 + 5/7 = b) 3/11+6/11+2/11= c) 1/2+13+16= e) 5/6-1/4-5/12=

Answer 1

2/7+5/7=1

3/11+6/11+2/11=1

1/2+13+16= 1/2+ 28 (aplifici pe 28 cu 2 si iti da 1/2+ 56/2=57/2)

5/6-1/4-5/12= aplifici prima fractie cu 2, a doua cu 3 si iti da 10/12- 3/12-5/12= 2/12 simplifici pein 2 si da 1/6