Question

12
Calcula.
a) (4 + 8) - (3-9)
b) 10 + (8 - 15 + 2-6
c) 12 - (7 + 11 - 14 - 8) d) -9 + (-4-3)
e) (6 - 12 + 2) - (11 – 4 + 2 – 5)

Answer 1

a) 12 - (-6) = 12 + 6 = 18
b) 10 + (-11) = 10 - 11 = -1
c) 12 - 7 - 11 + 14 + 8 = 16
d) -9 + (-7) = -9 -7 = -16
e) 6 - 12 + 2 - 11 + 4 - 2 + 5 = -8