Question

Realize as operações envolvendo números racionais . A) 1/5+(-2/3). B)(-3/50)-(+0,75)

Answer 1

a)1/5+(-2/3)=
3.1/15+(-5.2/15)=
3/15+(-10/15)=
3/15-10/15=
-7/15

b)(-3/50)-(+0,75)=
(-3/50)-(75/100)
-2.3/100-75/100=
-6/100-75/100=
-81/100=
-0,81