Algebraic Fractions

For
 $\frac{a}{4}+\frac{3a}{8}$  ,
What should the common denominator be?

• 4

• 8

• 16

• 32

For
 $\frac{5x}{6}+\frac{x}{10}$  ,
What should the common denominator be?

• 16

• 60

• 30

• 600

For
 $\frac{x}{3}+\frac{x}{6}=\frac{\lceil\ \ \ \ \rceil}{6}+\frac{x}{6}$  ,
What is in the missing blank?

• x

• 2x

• 3x

• 2

• 2a/0
• 2a/5
• 2a/10
• 2a

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2

CCSS.3.NF.A.3

Combine over a common denominator:

 $\frac{x}{2}+\frac{5}{2}$  

•  $\frac{5x}{2}$  

•  $\frac{x+5}{2}$  

•  $\frac{x+5}{4}$  

Combine over a common denominator:

 $\frac{x}{3}+\frac{x}{4}$  

•  $\frac{2x}{7}$  

•  $\frac{x^2}{7}$  

•  $\frac{7x}{12}$  

•  $\frac{7x}{24}$  

Combine over a common denominator:

 $\frac{2x}{3}-\frac{x}{4}$  

•  $\frac{5x}{12}$  

•  $\frac{x}{7}$  

•  $\frac{x}{12}$  

•  $\frac{11x}{12}$  

Combine over a common denominator:

 $\frac{2x}{9}+\frac{5x}{6}$  

•  $\frac{7x}{18}$  

•  $\frac{10x}{9}$  

•  $\frac{7x}{15}$  

•  $\frac{19x}{18}$  

For
 $\frac{n}{3}+\frac{2n}{7}=\frac{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }{21}$  ,
What is in the numerator?

•  $n+2n$  

•  $7n+6n$  

•  $7n+2n$  

•  $7n+3n$  

For
 $\frac{x}{3}+\frac{3x}{10}=$  ,
What is the final answer?

•  $\frac{10x+9x}{30}$  

•  $\frac{4x}{13}$  

•  $\frac{x}{30}$  

•  $\frac{19x}{30}$