Question

efetue a)7-(4-8) b)-2-(-13+8) c)1-[1-(2-2)] d)1-[1-(2-4)]

Answer 1

a) 7-(4-8) =
7-(-4)
7+4=11

b) -2-(-13+8)
-2- (-5) 
-2+5= 3

c) 1-[1-(2-2)]
1-[1-0]
1-1=0

d) 1-[1-(2-4)]
1-[1-(-2)]
1-[1+2]
1-3= -2