Adding and Subtracting Fractions

To add or subtract fractions you must have

• Common numerators

• Common denominators

• Common multiples

• common factors

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

If we have common denominators and we want to add or subtract them we need to

• add/subtract the numerator and slide over the denominator.

• add/subtract the numerator and add/subtract the denominator.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

 $\frac{1}{4}$   $+$   $\frac{2}{4}$  

•  $\frac{3}{4}$  

•  $\frac{3}{8}$  

•  $\frac{3}{16}$  

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

 $\frac{3}{8}$   $+$   $\frac{4}{8}$   $=$  

•  $\frac{1}{4}$  

•  $\frac{9}{8}$  

•  $\frac{7}{8}$  

•  $\frac{7}{16}$  

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

 $\frac{5}{6}$   $-$   $\frac{1}{6}$   $=$  

•  $\frac{4}{6}$  

•  $\frac{2}{6}$  

•  $\frac{7}{6}$  

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

 $\frac{6}{10}$   $+$   $\frac{4}{10}$   $=$       There are two correct answers.

•  $\frac{10}{10}$  

•  $\frac{2}{10}$  

• 1

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

 $\frac{10}{24}$   $+$   $\frac{6}{24}$   $=$  

•  $\frac{10}{20}$  

•  $\frac{4}{24}$  

•  $\frac{16}{24}$  

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

 $\frac{10}{12}$   $-$   $\frac{3}{12}$   $=$  

•  $\frac{7}{12}$  

•  $\frac{13}{12}$  

•  $\frac{6}{12}$  

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

2/12 + 3/12

• 5/12

• 5/24

• 6/12

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

4/5 - 1/5

• 5/5

• 3/5

• 3/0

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D