Vocabulary or Fraction rules
In a fraction problem, what is the top number called?
Numerator
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
Mr. R had half a cake left from his birthday. He wants to share it with 4 of his friends. How much of the cake does each friend get?
1/8 of the cake
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
Mr. Rodriguez bought 2 pizzas for the class. He cut the pizza into 1/4 pieces. How many pieces of pizza will he have in all?
8 pieces
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 an improper fraction?
Multiply the denominator with the whole number and add the numerator.
In a fraction, what is the bottom number called?
denominator
5/12 * 9
15/4 or 3 3/4
1 1/3 * 2 1/8
17/6 or 2 5/6
1/2 -: 5/8
4/5
Mr. Rodriguez ran 2/3 of a 5 km race. How are did he walk?
3 1/3 km
What should you do first to mixed numbers when multiplying or dividing fractions?
Convert, change, or make them to improper fractions.
2/9 * 3/8
1/12
2 2/3 * 5 1/4
14
3/8 -: 7/12
9/14
12 batches