`a.`
`3/4 + 8/12 = 9/12 + 8/12 = 17/12`
`b.`
`5/8 + 14/24 = 15/24 + 14/24 = 29/24`
`c.`
`4/25 + 3/5 = 4/25 + 15/25 = 19/25`
____
`a.`
`6/7 - 5/7 = 1/7`
`b.`
`7/12 - 2/4 = 7/12 - 6/12 = 1/12`
`c.`
`3/4 - 6/24 = 18/24 - 6/24 = 12/24 = 1/2`
___
`a.`
`11/6 - 2/3 = 11/6 - 4/6 = 7/6`
`b.`
`2 - 8/5 = 10/5 - 8/5 = 2/5`
`c.`
`3 - 3/8 = 24/8 - 3/8 = 21/8`