Math Fractions with Common Denominators

Which fraction is larger: $rac{3}{8}$ or $rac{4}{9}$? Use a common denominator to compare.

• $\frac{3}{8}$

• $\frac{4}{9}$

Tags

DOK Level 2: Skill/Concept

CCSS.4.NF.A.2

Find a common denominator for the fractions $\frac{3}{4}$ and $\frac{2}{3}$.

• 6

• 9

• 12

• 15

Tags

DOK Level 2: Skill/Concept

CCSS.4.NF.A.2

Find a common denominator for the fractions $\frac{2}{3}$ and $\frac{3}{4}$.

• 6

• 9

• 12

• 15

Tags

DOK Level 2: Skill/Concept

CCSS.4.NF.A.2

• 10

• 15

• 20

• 25

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

Mathematical Equivalence

ON

In order to ADD fractions, all denominators must be the...

• same

• different

5/6 + 1/12 =

• 6/18

• 5/60

• 11/12

• 10/12

1/9 + 2/27

• 3/27

• 5/27

• 3/27

• 3/36

What is the first step in solving this problem? 
⅘ + ½ =

• Add the top parts of the fraction

• Rewrite the fractions in the simplest form. 

• Find a common denominator. 

• Make each fraction into an improper faction.