Fraction Rules
If you have two even numbers in a fraction, what is the smallest common factor you could use?
2
2/3 * 4/5
8/15
1 1/2 * 5
15/2 or 7 1/2
How do we change a whole number into a fraction?
Put a 1 in the denominator, or put it over 1.
3/5 * 7/8
21/40
5/6 * 1 1/3
10/9 or 1 1/9
How do we change a mixed number into an improper?
Multiply the whole number by the denominator and add the numerator. Write this as the numerator. The denominator remains the same.
4 * 7/8
7/2 or 3 1/2
3 1/3 * 1/4
5/6
When dividing fractions, you are changing into ______________________ fractions?
multiplying
5/12 * 9
15/4 or 3 3/4
1 1/3 * 2 1/8
17/6 or 2 5/6
What should you do first to mixed numbers when multiplying or dividing fractions?
Convert them to improper fractions.
Change them to improper fractions.
Make them improper fractionns.
2/9 * 3/8
1/12
2 2/3 * 5 1/4
14