Pre-Algebra Demystified

1

10

þ

7

10

¼

1 þ 7

10

¼

8

10

¼

4

5

EXAMPLE

Add^38 þ^56.

SOLUTION

Step 1 Find the LCD. It is 24.
Step 2 Change the fractions to higher terms:

3

8

¼

9

24

5

6

¼

20

24

Step 3 Add the numerators:

9

24

þ

20

24

¼

9 þ 20

24

¼

29

24

Step 4 Simplify the answers:

29

24

¼ 1245

EXAMPLE

Add^23 þ^56 þ^34.

SOLUTION

Addition can be done vertically, as shown:

2

3

¼

8

12

5

6

¼

10

12

þ

3

4

¼

9

12

27

12

¼ 2123 ¼ (^214)

PRACTICE

Add each of the following fractions:

1.

5

11

þ

3

11

CHAPTER 4 Fractions: Part 2 57