Solution to

Frame 2-16.

Let's look at the problem 1

1

+

2

6

3473

6946

The denominators are not the same, so you must find a common

denominator. Since "6" is a multiple of "2" (2 x 3 = 6), you can change

1/2 to a form that has the same denominator as the other fraction.

1

X.

3

?

=

2

3

?

___________________________________________________________________

Solution to

Frame 2-17.

Since 3/6 is the same as 1/2, you can substitute (switch) 3/6 for 1/2 and

work the problem.

3

6

1

1

3

1

3+1

?

+

=

+

=

=

2

6

6

6

6

6

___________________________________________________________________

Solution to

Frame 2-18.

Subtraction of fractions works very similar to addition. Find the common

denominator, change one or both of the fractions until they have the

same denominator, and subtract the numerators.

6

Work these problems on your own:

1 _

1

=

2

6

1 _ 1 =

2

10

___________________________________________________________________

Solution to

Frame 2-19.

What happens, though, when one denominator is not a multiple of the

other. If you can't change the apples to oranges or oranges to apples,

maybe you can change them both to grapefruit. That is, find a common

3-1

2

=

denominator to which both denominators can be changed.

6

6

The common denominator will be a multiple of the _________________

5-1

4

=

of the first fraction and a multiple of the

of

10

10

the second fraction.

___________________________________________________________________

MD0900

2-8

Integrated Publishing, Inc. |