Question

efetue as operações A)1/5+2/3= B)1/9+1/6= C)7/5-1/15= D)1/9+3/9= E)4/5-1/5= F)2 1/4+3 2/7

Answer 1

a) 3+10/15 = 13/15
b) 2+3/18 = 5/18
c) 21-1/15 = 20/15 = 4/3
d) 4/9
e) 3/5
f) (2+3) + (1/4+2/7) = 5 15/28