 Common Denominators
2 years ago
rachbarlow
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Practice 20 QuestionsShow answers
• Question 1
120 seconds
Q. What is the least common denominator of 1/7 and 3/6?
14
21
7
42
• Question 2
120 seconds
Q. What is the least common denominator of 6/8 and 4/12?
12
24
8
16
• Question 3
120 seconds
Q. What is the least common denominator of 2/6 and 7/8?
36
8
18
24
• Question 4
120 seconds
Q. What is the least common denominator of 1/4 and 1/3?
4
3
12
8
• Question 5
120 seconds
Q. What is the least common denominator of 1/4 and 2/5?
5
25
10
20
• Question 6
120 seconds
Q. What is the least common denominator of 2/4 and 4/7?
24
7
42
28
• Question 7
120 seconds
Q. What is the least common denominator of 3/5 and 5/7?
35
25
7
30
• Question 8
120 seconds
Q. What is the least common denominator of 1/9 and 2/3?
6
3
9
21
• Question 9
120 seconds
Q. What is the least common denominator of 1/2 and 3/7?
2
14
7
28
• Question 10
900 seconds
Q. Which of these numbers could NOT be a common denominator for these two fractions?
2/4   and   3/8
32
12
8
24
• Question 11
900 seconds
Q. Which of these numbers could NOT be a common denominator for these two fractions?
1/6   and   1/4
12
18
24
36
• Question 12
900 seconds
Q. Which of these numbers could NOT be a common denominator for these three fractions?
1/3   and 2/5   and   3/10
15
30
60
90
• Question 13
900 seconds Q. Complete the equivalent fraction.
6
9
15
23
• Question 14
900 seconds
Q. Which of the following is an equivalent fraction to 5/6?
9/12
10/12
8/12
14/18
• Question 15
30 seconds
Q. What do you need to have when adding unlike fractions?
common denominator
common numerator
common numerator and denominator
• Question 16
30 seconds Q. Is this a correct answer?
Yes, the student correctly added.
No, you cannot add unlike denominators
No, 5 + 7 is not 12
No, 2 + 3 is not 5
• Question 17
900 seconds
Q. Jared ate 2/8 of his pizza for lunch and 3/8 of his pizza for supper.  How much of his pizza is left?
5/8
3/8
1/8
5/16
• Question 18
180 seconds
Q. What is the difference of 7/8 - 1/3?
6/5
8/11
6/8
13/24
• Question 19
180 seconds
Q. What is the least common denominator you could use to subtract 1/3 and 1/4?
3
4
24
12
• Question 20
180 seconds
Q. A plumber is fitting a water pipe that is 3/4 foot long on to a water pipe that is 2/12 foot long. How long will the finished pipe be?