Finding Common Denominator

What step should you do first when adding fractions with unlike denominators?

• Just add the denominators together

• Find a common denominator

• Add the numerators together first

• Chang each numerator to be the same

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What would be the common denominator for adding 1/2 + 3/4?

• 6

• 4

• 9

• 2

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What would be the common denominator for adding 3/9 + 4/6?

• 9

• 12

• 18

• 27

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Which fraction renames 3/4 with a denominator of 12?

• 3/12

• 4/12

• 12/12

• 9/12

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is 7/8 + 4/16 equal to?

• 11/24

• 18/16 = 1 2/16

• 3/8

• 11/16

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Solve 3/5 - 4/20

• 1/15

• 7/20

• 2/10 which simplifies to 1/5

• 8/20 which simplifies to 4/5

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

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

Solve 5/6 - 3/12

• 2/6

• 7/12

• 2/12

• 8/12

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What do you need to have when adding unlike fractions?

• common denominator

• common numerator

• common numerator and denominator

Tags

CCSS.7.NS.A.1C

What is the least common denominator of 1/4 and 1/3?

• 4

• 3

• 12

• 8