Adding negative fractions

Adding Rational Numbers: Positive and Negative Fractions

LT: Students will be able to apply what they know of adding negative integers to adding negative fractions.

Never forget to simplify your answer

Multiple Choice

 $\frac{9}{12}\ +\ \frac{3}{12}\ =$  

• 12/2

• 1

• 12

• 1/2

Never forget to simplify your answer

Multiple Choice

 $-\frac{2}{7}+\ \left(-\frac{2}{3}\right)\ =$  

• -21/20

• 21/20

• 20/21

• -20/21

Multiple Choice

 $\frac{5}{7}+\ \left(-\frac{9}{7}\right)\ =$  

• -4/7

• -7/4

• 4/7

• -7/4

To subtract a negative fraction, Use KFC

•  $\frac{1}{2}-\left(-\frac{3}{2}\right)=$  

• Keep the first number

•  $\frac{1}{2\ }+\left(-\frac{3}{2}\right)=$  

• Flip the operation

•  $\frac{1}{2}+\left(\frac{3}{2}\right)=$   $\frac{4}{2}=2$  

• Change the second number's sign

• Then solve, simplify if needed 

Multiple Choice

 $\frac{11}{6}\ -\ \left(-\frac{7}{6}\right)\ =$  

• -3

• 1/3

• -1/3

• 3