Question

Find each sum or difference

1. 5/10 - 3/10
2.1/2 + 3/4
3. 1/6 + 3/8
4. 7/8 - 5/12
5. The sum of two numbers is 7/8. One addend is 3/4. What is the other


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Answer 1

(1.)

`(5)/(10) - (3)/(10) \\ = (2)/(10) \\ = (1)/(5)`
(2.)

`(1)/(2) + (3)/(4) \\ = (1 * 2)/(2 * 2) + (3)/(4) \\ = (2)/(4) + (3)/(4) \\ = (5)/(4)`
(3.)

`(1)/(6) + (3)/(8) \\ = (1 * 4)/(6 * 4) + (3 * 3)/(8 * 3) \\ = (4)/(24) + (9)/(24) \\ = (13)/(24)`
(4.)

`(7)/(8) - (5)/(12) \\ = (7 * 3)/(8 * 3) - (5 * 2)/(12 * 2) \\ = (21)/(24) - (10)/(24) \\ = (11)/(24)`
(5.)

`(7)/(8) - (3)/(4) \\ = (7)/(8) - (3 * 2)/(4 * 2) \\ = (7)/(8) - (6)/(8) \\ = (1)/(8)`