Question

a) (+ 1 /4 ) + (+ 5/ 6 ) =
b) (− 3/ 4 ) + (− 1/ 2 ) =
c) (+ 1/ 2 ) - (+ 4/ 5 ) =
d) ( 1/6 ) + (- 3/4 ) +( 5/2 )=
e) (- 4,72) – (- 0,28) =
f) 4,5 + 0,02 + 19,2=

Answer 1

Explicação passo-a-passo:

a)

(+1/4) + (+5/6)

= 1/4 + 5/6

= 3/12 + 10/12

= 13/12

b)

(-3/4) + (-1/2)

= -3/4 - 2/4

= -5/4

c)

(+1/2) - (+4/5)

= 1/2 - 4/5

= 5/10 - 8/10

= -3/10

d)

(1/6) + (-3/4) + (5/2)

= 1/6 - 3/4 + 5/2

= 2/12 - 9/12 + 30/12

= -7/12 + 30/12

= 23/12

e)

(-4,72) - (-0,28)

= -4,72 + 0,28

= -4,44

f)

4,5 + 0,02 + 19,2

= 4,52 + 19,2

= 23,72