Resposta:
a- = 11/8
b- = 1/24
c- = 11/3
d- = -37/45
e- = 29/40
f- = 2/15
Explicação passo-a-passo:
a- 3/4 + 5/8 = (2x3 + 5)/8 = 11/8
b- 2/3 - 5/8 = (16-15)/24 = 1/24
c- 5/3 + 2 = (5 + 6)/3 = 11/3
d- 8/45 - 1 = (8 - 45)/45 = -37/45
e- 1/8 + 3/5 = (5+24)/40 = 29/40
f- 4/5 - 2/3 =(12 - 10)/15 = 2/15
