FRAME 2-8.
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
___________________________________________________________________
FRAME 2-9.
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