Fraction Rules
What operation do we use to simplify fractions?
Division
2/3 * 4/5
8/15
1 1/2 * 5
7 1/2
1/4 divided by 1/3
3/4
2/10
1/5
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
3 2/5 * 1/7
17/35
1/8 -: 3
1/24
10/15
2/3
3 word phrase to help us with dividing fractions.
Keep - Change - Flip
4 * 7/8
7/2 or 3 1/2
1 1/3 * 1 1/4
1 2/3
6 -: 1/8
48
10/70
1/7
When dividing fractions, the change step changes into what?
What is multiplying or multiplication?
5/12 * 9
15/4 or 3 3/4
2 1/3 * 5 1/4
12 1/4
1/2 -: 5
1/10
8/24
1/3
What should you do first to mixed numbers when multiplying or dividing fractions?
Convert/ change them to improper fractions.
2/9 * 3/8
1/12
2 2/3 * 1/4
2/3
1/12 -: 3
1/36
49/63
7/9