Question

supresion de paréntesis

Answer 1

+9-6=+3
-7-3=-10
-5+5=0
+2+8=+10
-4+9-6=-1
+10+3-15=-2

Answer 2

a) +9-6 = 3

b) -7-3 = -10

c) -5+5 = 0

d) +2+8 = 10

e) -4+9-6 = -1

f) +10+3-15 = -2