Fraction Rules
What is the reciprocal of 3?
1/3
2/3 * 4/5
8/15
Eight friends share 12 burritos equally. How many burritos does each friend get?
12/8 or 1 1/2
What is the reciprocal of
11/8
8/11
Multiply straight across (multiply numerators and multiply denominators)
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
Five bakers share 2 loaves of bread equally. What fraction of a loaf of bread does each baker get?
2/5
1/8 -: 3
1/24
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
A baker has 6 loaves of bread. Each loaf weighs 1 pound. He cuts each loaf into thirds. How many 1/3 pound loaves of bread would the baker have?
6 x 3= 18
6 -: 1/8
48
How do we convert a mixed number into a fraction?
"around the world"
What is the correct vocabulary word for "flip"
reciprocal
5/12 * 9
15/4 or 3 3/4
There are 12 students in a jewerly-making class and 8 sets of charms. What fraction of a set of charms will each student get?
2/3
1/2 -: 5
1/10
What is the first rule in dividing fractions?
Keep fraction the same.
What should you do first to mixed numbers when multiplying or dividing fractions?
Change them to improper fractions.
2 2/3xx3 1/4
8 2/3
Twelve students share three peaches equally. What fraction of a fruit does each friend get?
3/12 or 1/4
4 1/5 -: 3 1/2
1 1/5
What fraction do we flip?
the second fraction