Solution to

Frame 2-9.

Adding fractions with common denominators is like adding apples and

apples. For example, saying 3 + 1 = 4

a. 9 - 5 = 4

8

8

8

12

12

is much like saying "3 apples plus 1 apple equals 4 apples," with

"apples" being "eighths."

b. 17 - 5 = 12

31

31

But what if you have 3

1 ? What is "3 apples plus 1 orange"?

+

8

4

c. 5 - 2 = 3

10

10

This problem cannot be solved as long as the fractions are in their

present form because they do not have the same

.

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Solution to

Frame 2-10.

Have you ever had a friend named James? Some people may call him

"James," some may call him "Jim," some may call him "Jimmy," and his

denominator

little sister may even call him "Bo," but he is the same person regardless

of what you call him. Fractions also have many different "names" or

forms, and you can change the fraction's name when you need to.

If you can't work with the denominator of a fraction, change the "name" of

the fraction until it has the

that you do

want.

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MD0900

2-5

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