Question

a fracao como adicao e subtracao?
tipo;
3/5 + 2/3=?
2/3-3/5=?

Answer 1

3/5 + 2/3 = 
mmc (3 e 5)= 3.5 = 15
(3.3)/15 + (2.5)/15=
9/15 + 10/15= 19/15
2/3 - 3/5= 
mmm(3,5)= 15
(2.5)/15 - (3.3)/15=
10/15 - 9/15= 1/15