Solution to

Frame 2-13.

If two fractions have different denominators, see if the larger denominator

is a multiple of the smaller. That is, can the smaller denominator be

multiplied by a whole number and the product be the larger denominator?

1

=

If so, then the larger denominator can be the common denominator.

4

8

8 is a multiple of 4 because 4 x

= 8.

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Solution to

Frame 2-14.

Therefore, :

3

1

3

2

3+2

?

+

=

+

=

=

8

4

8

8

8

8

4x **2 **= 8

[Adding 2/8 is the same as adding 1/4 since both are forms of the same

number (value).]

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Solution to

Frame 2-15.

You know that if you multiply a number by "1," then the product is the

original number. For example, 4 x 1 = 4. The same is true if the number

is a fraction. For example: 1 X 1 = 1

8

2

2

The number "1" has several forms, or names.

Some are 1 , 2 , 3, and 4.

1 2 3

4

In each case, the numerator and the denominator are the same.

Multiplying a fraction by one of the forms of "1" allows you to change the

appearance of the fraction so that it has a different denominator. Now

let's find some different names (forms) of the fraction 1/2.

(Remember, multiplying a fraction by "1" [regardless of the form of "1"

you use] yields a fraction whose actual value has not changed, even if its

form has changed.)

1

2

2 ;

1

3

3 ;

1

10

10 ;

1

3473 = ?

X

=

X

=

X

=

X

2

2

4

2

3

6

2

10

20

2

3473

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MD0900

2-7

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