FRAME 2-2.
Solution to
Frame 2-1.
In text, fractions are usually written in a horizontal form, such as "5/12,"
for ease of reading. When performing calculations, fractions are usually
7
written in a vertical form, such as 5.
12
12
The top (or first) number is called the numerator. The number on bottom
(or second number) is called the denominator.
In the fraction 5/12, "5" is the
and
"12" is the
.
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FRAME 2-3.
Solution to
Frame 2-2.
MULTIPLYING AND DIVIDING FRACTIONS. It may seem strange to
begin with multiplication and division of fractions rather than addition and
5
numerator
subtraction. The multiplication and division functions are relatively simple
operations, however, and multiplication must be understood before
12
denominator
addition and subtraction of some fractions can be performed.
To multiply fractions:
(1)
Multiply the numerators together;
(2)
Multiply the denominators together; and
(3)
Place the product of the numerators over the product of the
denominators.
For example:
2
4
2x4
8
X
=
=
3
5
3x5
15
You work
1
2
1x2
?
X
=
=
this one.
3
7
3x7
?
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FRAME 2-4.
Solution to
Frame 2-3.
Let's try four more.
2
a. 1
1
b. 3
1
___
X
=
X
=
21
2
2
4
2
c. 2
1
7
d. 3
2
___
X
X
=
X
=
7
8
10
2
6
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MD0900
2-2