Add & Subtract Fractions (7.3A)

When adding and subtracting fractions you must find the ________ _________ and reduce, if necessary.

When you're finding your common denominator what do you use:

• LCM (Least Common Multiple)

• GCF (Greatest Common Factor)

When you're reducing your fractions, what do you use?

• LCM (Least Common Multiple)

• GCF (Greatest Common Factor)

 $4\ \frac{3}{8}\ +\ 5\ \frac{2}{3}\ =$  

•  $9\ \frac{5}{11}$  

•  $9\ \frac{25}{24}$  

•  $10\ \frac{1}{24}$  

• Not here

 $\frac{17}{18\ }\ -\ \frac{5}{12}\ =$  

• 2

•  $\frac{19}{36}$  

•  $\frac{12}{6}$  

• Not here

 $4\ \frac{3}{5}\ +\ 2\ \frac{1}{8}\ =$  

•  $6\ \frac{29}{40}$  

•  $6\ \frac{4}{40}$  

•  $6\ \frac{1}{10}$  

• Not here

 $4\ \frac{9}{10}\ -\ 3\ \frac{2}{3}\ =$  

•  $1\ \frac{47}{30}$  

•  $1\ \frac{7}{30}$  

•  $2\ \frac{17}{30}$  

•  $7\ \frac{7}{30}$  

 $\frac{7}{9}\ +\ \frac{1}{2}\ =$  

Evaluate responses using AI:

OFF

Answer explanation

 $1\ \frac{5}{18\ }$  or 1 5/18

 $\frac{4}{5}\ -\ \frac{3}{8}\ =$  

Evaluate responses using AI:

OFF

Answer explanation

 $\frac{17}{40}$  or 17/40

 $2\ \frac{3}{5}\ -\ \frac{3}{4}$  

Evaluate responses using AI:

OFF

Answer explanation

 $1\ \frac{17}{20}$  or 1 17/20