Question

4) Calcule o valor das expressões:

a) 3 - 5 - 6 - 2 + (- 6 + 9) =

b) 3 + 2 – (+ 4 + 5 ) – ( + 1 ) - 2 =

c) (- 60 – 10) + 21 + 19 + 20 + 20 – 10 =

d) 30+ (350 -45) + (25x5) ​

Answer 1

Explicação passo-a-passo:

a)3-5-6-2+(-6+9)=3-5-6-2+3= -7

b)3+2-(+4+5)-(+1)-2=3-9-1= -7

c)(-60-10)+21+19+20+20-10=

(-70)+21+19+20+20-10=

-70+21+19+20+20-10=0

d)30+(350-45)+(25•5)

30+305+125=460

Answer 2

a) 3 - 5 - 6 - 2 + (- 6 + 9) =

3 - 5 - 6 - 2 + 3 =

-7

b) 3 + 2 – (+ 4 + 5 ) – ( + 1 ) - 2 =

3 + 2 - 9 - 1 - 2 =

5 - 12 =

-7

c) (- 60 – 10) + 21 + 19 + 20 + 20 – 10 =

-70 + 21 + 19 + 20 + 20 – 10 =

-49 + 39 + 10 =

-10 + 10 =

0

d) 30+ (350 -45) + (25x5) ​=

30 + 305 + 125 =

335 + 125 =

460

ESPERO TER LHE AJUDADO!

BONS ESTUDOS!