Question

7) Observe atentamente e calcule: (valor 1,0 ponto)
a) + 9 – 5 = _______ b) – 7 – 6 = ______ c) – 8 + 10 = _____ d) – 12 + 3 = ______

Answer 1

a) 9 - 5 = 4
b) -7 -6 = -13
c) -8 + 10 = + 2
d) -12 + 3 = -9