Fraction Rules
What is a strategy to simplify fractions? What do we use?
Use divisibility rules or divide by least common factor.
2/3 + 4/5
1 7/15
What is the LCM for 12 and 10
60
1/2 * 5
2 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.
7/8 - 3/5
11/40
What is the GCF of 36 and 27?
9
5/6 * 3/10
1/4
1/8 -: 3
1/24
3 word phrase to help us with dividing fractions.
Keep - Change - Flip
4 - 7/8
3 1/8
Convert to a mixed number
56/12
4 8/12 = 4 3/4
1/3 * 1/4
1/12
6 -: 1/8
48
When dividing fractions, you are changing into ______________________ fractions?
multiplying
5/12 + 9 1/3
9 9/12 = 9 3/4
Convert to an improper fraction
4 3/8
35/8
1/3 * 6/7
2/7
1/2 -: 5 3/4
2/23
What should you do first to mixed numbers when multiplying or dividing fractions?
Convert them to improper fractions
3 7/9 - 1 3/8
2 29/72
Solve:
11+( 2/3 */* 4/15)
12 1/2
1/6
1/6
1/12 -: 3 1/3
1/40