Question

elimine os parênteses e calcule
a) +5+7(7-3) =

b) 8-(-2-1) =

c) -6-(-3+2)=

d) 18-(5-2-3) =
e) 30 - (6-1+7)=

Answer 1

5+49-31= 23
8+3-2= 9
-6+3-2= -5
18-5+2+3=18
30-6+1-7= 18