Adding Fractions and Mixed Numbers

What must you do first in order to add or subtract fractions with unlike denominators?

• add the numerators
• add the denominators
• find a common denominator
• find a common numerator

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

Add the fractions. Simplify if needed.

• $\frac{12}{17}$

• $\frac{17}{20}$

• $\frac{20}{17}$

• $2\ \frac{1}{2}$

Add the fractions. Simplify if needed.

• 1

• $\frac{3}{6}$

• $\frac{1}{2}$

• 2

Add the fractions. Simplify if needed.

• $\frac{13}{15}$

• $1\ \frac{7}{12}$

• 1

• $\frac{9}{15}$

What is the LEAST common denominator for the expression:
 $1\ \frac{4}{5}+\frac{5}{6}+1\ \frac{3}{4}+2\ \frac{1}{2}$  

• 60

• 30

• 24

• 120

Add the mixed numbers vertically. Simplify if needed.

• $9\ \frac{5}{7}$

• $5\ \frac{2}{3}$

• $10\ \frac{1}{5}$

• $11\ \frac{5}{6}$

Add the mixed numbers vertically. Simplify if needed.

• $14\ \frac{17}{30}$

• $13\ \frac{47}{30}$

• $\frac{1}{2}$

• $15\ \frac{2}{3}$

Add the mixed numbers vertically. Simplify if needed.

 $3\ \frac{2}{3}+1\ \frac{1}{8}$  

•  $4\ \frac{3}{24}$  

•  $4\ \frac{3}{11}$  

•  $4\ \frac{19}{24}$  

•  $4\ \frac{3}{8}$  

 $2\ \frac{2}{10}+5\ \frac{1}{5}=$  Add the mixed numbers vertically. Simplify if needed.

•  $5\ \frac{3}{4}$  

•  $7\ \frac{2}{5}$  

•  $3\ \frac{3}{5}$  

•  $7\ \frac{4}{10}$