Adding Fractions & 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

Tags

CCSS.7.NS.A.1C

Add the fractions. Simplify if needed.

• $\frac{12}{17}$

• $\frac{17}{20}$

• $\frac{20}{17}$

• $2\ \frac{1}{2}$

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

 $9\ \frac{1}{2}+7\ \frac{1}{2}$ 

• 17

• 16

•  $14\ \frac{1}{2}$  

•  $16\ \frac{1}{2}$  

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

• 5/4
• 4/5
• 11/4
• 4/11

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 37/2
• 52/7
• 7/37
• 37/7

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 24/4
• 35/4
• 11/3
• 28/3

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 24/5
• 10/5
• 30/5
• 34/5

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

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.

• 1

• $\frac{3}{6}$

• $\frac{1}{2}$

• 2

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Add the fractions. Simplify if needed.

• $\frac{13}{15}$

• $1\ \frac{7}{12}$

• 1

• $\frac{9}{15}$

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2