Question

1. Calcule as expressões numéricas abaixo:
a) (–8) – (–3) d) –10 – (+30) g) –25 + (–100) – (–125)
b) (+10) – (+6) e) +20 – (–6) h) 0 – (–4)
c) 42 – (–50) f) (–60) – (+60) + (–100) – 9
h) 0-( -4) =

Answer 1

a .

( -8) -( -3)

(-8 ) + 3

= -5

b.

(+10)-(+6)

10 - 6

= 4

c.

42 -( -50)

42 + 50

= 92

d.

-10 - (+30)

- 10 - 30

= -40

E.

20 - ( - 6)

20 + 6

= 26

f.

(-60) - ( +60) +( - 100) -9

-60 - 60 -100 -9

-120 - 109

= - 229

g.

-25 +(-100) - (- 125)

-25 - 100 + 125

-125 + 125

= 0

h.

0 - ( - 4)

0 + 4

= 4