You must now change your fractions to tenths.
1 = 1x5 = 5
1 = 1x2 = 2
2 2x5 10
5 5x2 10
REMEMBER: The new fractions are the same in value as the old fractions.
b. To add fractions, find the lowest common denominator and change the
fractions to fractions having the same denominator. Then add the numerators.
EXAMPLE: 1 + 3 = ?
3 4
Change fractions to the lowest common denominator.
Then add the numerators.
1= 4
3 12
3= 9
4 12
4 + 9 = 13 or 1 1
12 12 12
12
c. To subtract fractions, again find the lowest common denominator and change
the fractions to fractions having the same denominator. Then, subtract the second
numerator from the first numerator.
EXAMPLE: 3 - 1 = ?
4 3
3
9
=
4 12
1=4
3 12
9 - 4 = 9-4 = 5
12 12 12 12
1-23. MULTIPLYING TWO FRACTIONS
Two fractions may be multiplied by:
a. Multiplying the numerators.
MD0904
1-18