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

a) 5+7-7-3= 2
b) 8+2+1= 11
c) -6+3-2= -5
d) 18-5+2+3= 18
e) 30-6+1-7= 18