Question

Calcule as somas:
a) (-1/2) + (-1,9) =
b) (4,56) + (3/5) =
c) (-9,8) + (1,5) =
d) (4/5) + (-3/4) =

Answer 1

Resposta:

a) -2,4 b) 5,7 c) -8,3 d) -31/20

Explicação passo-a-passo:

a)  (-1/2) + (-1,9)

-1/2 -1,9/1 ->  -1 + (-3,8)/2 -> -4,8/2 -> -2,4

b) (4,56) + (3/5)

4,56 + 3/5 -> 22,80 + 3/5 -> 25,80/5 -> 5,7

c) (-9,8) + (1,5)

-9,8 + 1,5 -> -8,3

d) (4/5) + (-3/4)

4/5 - 3/4 -> 16 + (- 15)/20 -> -31/20