Common Denominators and Renaming Fractions

What would be the Lowest Common Denominator (LCD) for these fractions?

2/4 and 3/6

• 12

• 4

• 6

• 24

When you are finding the Lowest Common Denominator, you are finding the Lowest common ________ of the denominators.

• multiple

• game

• shape

• thing

What do you need to have when adding unlike fractions?

• common denominator
• common numerator
• common numerator and denominator

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

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

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common denominator you could use to subtract 1/3 and 1/4?

• 3
• 4
• 24
• 12

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common denominator of 1/7 and 3/6?

• 14
• 21
• 7
• 42

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

• 6

• 4

• 9

• 2

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

• 9

• 12

• 18

• 27

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

• 3/12

• 4/12

• 12/12

• 9/12

Tags

CCSS.4.NF.A.1

CCSS.3.NF.A.3B

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