Question

Calcule.
a) 2/3 + 1/5 =

b) − 7/4 + 3/5 =

c) 7/8 · 4/3 =

Answer 1

Explicação passo-a-passo:

a) 2/3 + 1/5 = 5.2 + 3.1

————— = 13/15

15

b) − 7/4 + 3/5 = 5. (-7) + 4.3 -35 + 12

—————— = ————— = -23/20

20 20

c) 7/8 · 4/3 = 7.3 / 8.4 = 21/32