Respuesta :

garydesir1

9/15+3/15

= 9+3/15

= 12/15

= 4/5 or decimal = 0.8


2/8+6/8

1/4+3/4

= 1


5/10-3/10

= 1/2-3/10

=1/5


5/8+3/8

= 5+3/8

= 8/8

Simplify by 8

= 1


I hope that's help !

good job