Common Denominator

What do you need to have when adding unlike fractions

• common denominator

• common numerator

• common numerator and denominator

• common fractions

• 1
• 3
• 9
• 8

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

• $\frac{3}{8}$

• $\frac{4}{9}$

Tags

DOK Level 2: Skill/Concept

CCSS.4.NF.A.2

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

• $rac{2}{5}$

• $rac{3}{7}$

Tags

DOK Level 2: Skill/Concept

CCSS.4.NF.A.2

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

• $rac{1}{3}$

• $rac{2}{5}$

Tags

DOK Level 2: Skill/Concept

CCSS.4.NF.A.2

Mathematical Equivalence

ON

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

• $rac{5}{6}$

• $rac{7}{8}$

Tags

DOK Level 2: Skill/Concept

CCSS.4.NF.A.2

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

• $rac{3}{8}$

• $rac{4}{9}$

Tags

DOK Level 2: Skill/Concept

CCSS.4.NF.A.2