Solution to

Frame 2-7.

If two fractions have the same denominator (called a "common

denominator"), you add the fractions by simply adding the numerators

b. Bottom

together and putting the sum over the common denominator. YOU DO

NOT ADD THE DENOMINATORS TOGETHER. For example:

3

1

3+1

4

+

=

=

8

8

8

8

More than two fractions can be added together at one time as long as

they all have the same denominator. Complete the following exercise.

2

1

5

4

+

+

+

=

17

17

17

17

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Solution to

Frame 2-8.

When you add two fractions with the same denominator together, you

add the numerators and put the sum over the common denominator.

2+1+5+4 = 12

Likewise, when you subtract two fractions with the same denominator,

17

17

you subtract the numerators and put the difference over the common

denominator.

For example: 4 _ 1

=

4-1 = 3

8

8

8

8

Solve the following subtraction problems:

a.

9 _ 5 =

12

12

b. 17 _ 5 =

31

31

c.

5 _ 2 =

10

10

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MD0900

2-4

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