Question

Resolva as seguintes expressões numéricas:


a) 15 – (8 – 7) + (9 – 4) =

b) 25 – (– 4 – 5) =

c) ( 9 – 4 + 2 ) – 1 + ( 9 + 5 – 3) =

d) 18 – [ 2 + ( 7 – 3 – 8 ) – 10 ] =

e) 12 – { – 3 + [1 + (+ 2 – 9) – 8] + 5} =​

Answer 1

Explicação passo-a-passo:

a) 15-1+5=

14+5=

19

b) 25-(-9)=

25+9=

34

c) (5+2)-1+(14-3)=

7-1+11=

6+11=

17

d) 18-[2+(4-8)-10]=

18-[2+(-4)-10]=

18-[-2-10]=

18-[-12]=

18+12=

30

e) 12-{-3+[1+(-7)-8]+5}=

12-{-3+[1-7-8]+5}=

12-{-3+[-6-8]+5}=

12-{-3+[-14]+5}=

12-{-3-14+5}=

12-{-17+5}=

12-{-12}=

12+12=

24

Espero ter ajudado