Repeedeee vaaaaa roggg multtt

Răspuns:
a) 1/7 + 1/4 = 11/28
b)1/5 - 1/6 = 11/30
c)1/4 + 1/6 = 5/12
d)7/8 - 5/12 = (21 -10) / 24 = 11/24
e)9/5 - 3/10 = 15/10 = 3/2
f)9/20 + 4/5 = 25/20 = 5/4
Explicație pas cu pas: