Question

calcule o valor das seguinte expressoes
a) 25-(8-5+3)-(12-5-8)=
b) (10-2)-3+(8+7-5)=
c) (9-4+2)-1+(9+5-3)=
d) 18-[2+(7-3-8)-10]=

Answer 1

letra (A):20
letra (B):15
letra(C):17
letra(D):30

Answer 2

a) 25-(8-5+3)-(12-5-8)
25-(3+3)-(7-8)
25-6-(-1)
25-6+1
19+1 = 20

b) (10-2)-3+(8+7-5)
8-3+(15-5)
8-3+10
5+10 = 15

c) (9-4+2)-1+(9+5-3)
(5+2)-1+(14-3)
7-1+11
6+11 = 17

d) 18-[2+(7-3-8)-10]
18-[2+(4-8)-10]
18-[2+(-4)-10]
18-[2-4-10]
18-[-2-10]
18-[-12]
18+12 = 30