Fraction Rules
What step is used to simplify fractions when multiplying or dividing?
What is pull out common factor or LCF.
2/3 * 4/5
8/15
1 1/2 * 5
7 1/2
What is the reciprocal of
11/8
8/11
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
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
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
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