Question

Resolva as expressões numericas

a) 15-(3-2)+(7-4)

b) (25-(8-5+3)-(12-5-8)

c)10-{-2+{-3-{-1+7}+2}

d) 2(9+15)+35

Answer 1

a)
15-(3-2)+(7-4)
15-3+2+7-4
24-7
17

b)
(25-(8-5+3)-(12-5-8)
(25-(6)-(12-5-8)
(25-6)-(12-5-8)
19-(12-13)
19-(-1)
19+1
20

c)
10-{-2+{-3-{-1+7}+2}
10-{-2+{-3-{6}+2}
19-{-2+{-3-6+2}
19-{-2+{-9+2}
19-{-2+{-7}
19-{-2-7}
19-{-9}
19+9
28

d)
2(9+15)+35
18+30+35
18+65
83
Espero ter ajudado!