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
7 1/2
What is the reciprocal of
11/8
8/11
What is the reciprocal of
2 1/3
7/3
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
1 1/9
3/8 -: 2/3
9/16
2 1/8 -: 3
17/24
3 word phrase to help us with dividing fractions.
Keep - Change - Flip
4 * 7/8
3 1/2
3 1/3 * 1/4
5/6
6 -: 5/8
9 3/5
1 1/8 -: 1/10
11 1/4
When dividing fractions, you change to ____________ fractions?
multiplying
5/12 * 9
3 3/4
1 1/3 * 2 1/8
2 5/6
1/2 -: 5/8
4/5
3 1/4 -: 1 1/2
2 1/6
What should you do first to mixed numbers when multiplying or dividing them?
Convert them to improper fractions.
2/9 * 3/8
1/12
2 2/3 * 5 1/4
14
3/8 -: 7/12
9/14
3 1/2 -: 5 2/3
21/34