Questions is in the picture. no links please illl give and 50 points only if answered properly

subtract

a) 13/20

b) 1/2

c) 5/24

d) 7/18

e) 7/20

f) 3/40

Add or subtract

a) 4/9

b) 1/2

c) 11/20

d) 1/4

e) 19/12 or 1

f) 4/21

im pretty sure it would be 5 am, hope that , and give brainliest and guys if this is right then press the button and give 5 stars