Common Denominator Puzzle

Which of these numbers could NOT be a common denominator for these two fractions?
2/4   and   3/8

• 32

• 12

• 8

• 24

Which of these numbers could NOT be a common denominator for these two fractions?
1/6   and   1/4

• 12

• 18

• 24

• 36

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

What do you need to have when adding unlike fractions?

• common denominator

• common numerator

• common numerator and denominator

You must find the ​ (a)   before you can add or subtract fractions with unlike denominators.

• common denominator

• common numerator

• multiple

• simplified fraction

You must find the (a)   before you can add or subtract fractions with unlike denominators.

• common denominator

• common numerator

• multiple

• simplified fraction

Which can you use as a denominator to write equivalent fractions for 4/7 and 5/6?

• 24

• 30

• 35

• 42

Which of the following would be the new fractions for finding common denominators for 3/4 and 2/6?

• 9/12 and 4/12

• 6/8 and 4/12

• 9/12 and 6/18

• 2/12 and 6/12

Which 2 expressions​ do you need to find Common Denominators for?​ (a)   ​ (b)  

Fill in the missing number to form an equivalent fraction.

• 3

• 5

• 8

• 10