Question

Calcule os números racionais -

a)-5/3+2/3

b)-8/5+7/5

c)-2/4-6/5​

Answer 1

a)
= -5/3+2/3
= -3/3
= - 1

b)
= - 8/5+7/5
= - 1/5

c)
= - 2/4 (:2)/(:2) -6/5​
= - 1/2 - 6/5
= (- 5 - 2.6)/10
= (- 5 - 12)/10
= - 17/10