Common Denominator and Rewrite Fractions

Mathematical Equivalence

ON

• 10

• 15

• 20

• 25

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CCSS.3.NF.A.3B

CCSS.4.NF.A.1

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

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CCSS.7.NS.A.1C

Which fraction is larger: $rac{5}{6}$ or $rac{7}{8}$? Use a common denominator to compare.

• $\frac{5}{6}$

• $\frac{7}{8}$

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DOK Level 2: Skill/Concept

CCSS.4.NF.A.2

Match the following fractions with the correct common denominator.

• 24

• 6

• 14

• 10

Which fraction is smaller: $rac{1}{3}$ or $rac{2}{5}$? Use a common denominator to compare.

• $rac{1}{3}$

• $rac{2}{5}$

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DOK Level 2: Skill/Concept

CCSS.4.NF.A.2

Which fraction is larger: $rac{2}{5}$ or $rac{3}{7}$? Use a common denominator to compare.

• $\frac{2}{5}$

• $\frac{3}{7}$

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DOK Level 2: Skill/Concept

CCSS.4.NF.A.2

5/6 - 3/8 =

• 12/24

• 11/24

• 1/2

• 7/12

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CCSS.7.NS.A.1C

Add, simplify if needed.
1/4 + 2/6 =

• 1 1/12

• 12/12

• 7/12 

• 5/12

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CCSS.5.NF.A.1

CCSS.5.NF.A.2

Q1. What is the ratio of 14 to 16?

• 14/16

• 7/8

• 8/7

• 4/10

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CCSS.6.RP.A.1

CCSS.6.RP.A.2