Common Denominators
A common denominator for 6 and 8
What is 24, 48, ...?
2/3 + 1/4
What is 11/12?
5/6 • 1/2
What is 5/12
1/4 divide 5/7
What is
7/20
Is 16/5 an improper fraction or a mixed number? WHY?
improper fraction
Because the numerator is bigger than the denominator
John has 1/2 inch of string. He buys another 1/3 of an inch of string. How much string does he have now?
5/6 of an inch
A common denominator for 3 and 6.
What is 6, 12, 18...?
4/5 + 3/9
What is
51/45 or 17/15 or 1 2/15
6/4 • 3/9
What is
18/36 or 1/2
2/9 divide 1/7
What is
14/9
The top number of a fraction
What is a numerator?
Write 3 3/4 as an improper fraction.
15/4
A common denominator for 8 and 9.
What is 72?
5/2 - 4/3
What is
7/6
4/5 • 7/12
What is
28/60 or 14/30 or 7/15
1/3 divide 4/5
What is
5/12
The number in the bottom of a fraction.
What is the denominator?
Sam has 24 sandwiches. He wants to cut them into 1/3 pieces. How many 1/3 pieces will he have?
72 pieces
A common denominator for 5 and 12.
What is 60?
3/2 - 1/4
What is
5/4
3/4 • 5/3
What is
15/12 or 5/4
7/8 divide 9/10
What is
35/36
Explain the process for reducing a fraction
Find all the factors of n&d; find the largest in common; divide that factor out.
Robert has 3 containers of strawberries.He gives away 1 1/4 containers of strawberries. How many containers does he have left?
7/4 or 1 3/4 containers
The common denominator is 35. One denominator is 7. The other is...
What is 5?
5/8 - 11/20
What is
3/40
1/5 • 1/3 • 2/6
What is
2/90 or 1/45
3/4 divide 4/5
What is
15/16
Reduce 8/12
What is 2/3?
Write 14/3 as a mixed number