Question

elimine os parenteses e calcule as somas algebricas A) +10+(8)+(-4) B) -5+(-6)-(8) C) 3+(+9-4) D) -6+(+2+6-3) E) 3+(-8+2)-(-9+1)

Answer 1

A) +10+(8)+(-4) = +10+8-4 ==>  14

B) -5+(-6)-(8) = - 5 - 6 - 8 ==> - 19

C) 3+(+9-4) = 3 +(+5) ==> 3+5 ==> 8

D) -6+(+2+6-3) = - 6 + ( +5) ==> - 6 + 5 ==> - 1

E) 3+(-8+2)-(-9+1) = 3+(-6)-(-8) ==> 3-6+8 ==> + 5

Answer 2

a) 10 + 8 - 4 
R = 14

b) - 5 - 6 - 8 
R = - 19

c) 3 + 9 - 4 
R = 8

d) - 6 +2 + 6 - 3
R = -1

e) 3 - 8 + 2 + 9 - 1
R = 5