Question

Me ajudem,por favor!!!

Answer 1

Explicação passo-a-passo:

a) 3/4 + 9/2 = 3/4 + 18/4 = 21/4

b) 5/3 + 6/4 = 20/12 + 18/12 = 38/12 = 19/6

c) 9/8 + 5/8 = 14/8 = 7/4

d) 5/2 + 7/3 + 1/4 = 30/12 + 28/12 + 3/12 = 61/12

e) 8/7 * 6/5 = 48/35

f) 3/5 * 2/7 * 3/9 = 18/315 = 6/105 = 2/35

g) 4/5 : 8/3 = 12/40 = 6/20 = 3/10

h) 3 : 6/9 = 27/6 = 9/2

i) (-5) + (+12) = -5 + 12 = 7

j) (-7) + (-9) = -7 -9 = -16

k) (+14) - (-24) = 14 + 24 = 38

l) (-8) - (+6) = -8 - 6 = -14

m) (+35) - (-26) = 35 + 26 = 61

n) (-7) + (-5) - (-9) = -7 - 5 + 9 = - 3