Fraction Rules
When changing a mixed number into an improper fraction, what acronym helps do that?
M - Multiply
A - Add
D - Denominator stays the same
2/3 * 4/5
8/15
1 1/2 * 5
15/2
Multiply
11/8 ➗ 2/3
22/24 or 11/12
1 1/5 ➗ 3/10
60/15 or 4/1
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
20/18 or 10/9
3/8 -: 2/3
9/16
3 1/2 ➗ 7/8
56/14 or 8/2 or 4
3 word phrase to help us with dividing fractions.
Keep - Change - Change
4 * 7/8
28/8 or 7/2
3 1/3 * 1/4
10/12 or 5/6
6 -: 5/8
48/5
2 3/4 ➗ 3/8
88/12 or 22/3
When dividing fractions, you are changing into ______________________ fractions?
multiplying
5/12 * 9
45/12 or 15/4
1 1/3 * 2 1/8
68/8 or 17/6
1/2 -: 5/8
8/10 or 4/5
1 2/3 ➗ 2 1/4
20/36 or 5/9
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
6 /72 or 1/12
2 2/3 * 5 1/4
168/12 or 14
3/8 -: 7/12
9/14
3 1/4 ➗ 1 3/8
Simplify for the full points
26/11