Fraction Rules
How can you simplify fractions?
Divide the numerator and denominator by the same thing.
2/3 * 4/5
8/15
1 1/2 * 5
15/2 or 7 1/2
What is the reciprocal of
11/8
8/11
Robert Carl Baker invented a food made of small pieces of poultry and covered in breading and deep fried. What was his invention?
Chicken Nugs
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
10/9 or 1 1/9
3/8 -: 2/3
9/16
All fractions are also what type of problem?
Division problem
3 word phrase to help us with dividing fractions.
Keep - Change - Flip
4 * 7/8
7/2 or 3 1/2
3 1/3 * 1/4
5/6
6 -: 5/8
48/5 or 9 3/5
How do we convert a mixed number into a fraction?
Multiply the denominator with the whole number and add the numerator.
How do you multiply fractions?
Multiply straight across (multiply numerators and multiply denominators)
5/12 * 9
15/4 or 3 3/4
1 1/3 -: 3 1/5
20/48 or 5/12
1/2 -: 5/8
4/5
Which Disney princess had glass slippers?
Cinderella
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
1/12
2 2/3 -: 5 1/4
32/63
3/8 -: 7/12
9/14
What fraction do we flip?
the second fraction