Common Denominators

Common Denominator Fractions

Poll

When we add and subtraction fractions, do we have to have common denominators (same numbers on the bottom of the fraction)?

• Yes

• No

• Don't Know

• Fractions?

Poll

Common denominators means that both fractions have different numbers on the bottom of the fraction?

• Yes, different denominators

• No, same denominators

• Denominators, what are those?

• Handley, what?

Add & Subtract Fractions - Common Denominators 

• Add the numerators (top numbers)

• Add the denominators (bottom numbers)

Poll

What happens when the numerator is a bigger number than the denominator?

• Handley, what?

• We divide the numerator (top number) by the denominator (bottom number)

• Not sure

• We do not need to do anything - the answer is correct!

Improper Fractions

• Divide the numerator by the denominator. Example in picture: 16 divided by 6. 6 only goes into 16 twice, with some with 4 left over (remander)! 

• 2 becomes our whole number. 

• 4, the remainder, becomes our new numerator. 

• 6 stays our denominator. 

Fill in the Blanks

$\frac{1}{5}+\frac{2}{5}=$  

Fill in the Blanks

$\frac{11}{12}-\frac{4}{12\ }=\$  

Fill in the Blanks

$\frac{7}{8}+\frac{6}{8}=$   

Fill in the Blanks

$\frac{2}{9}+\frac{7}{9}=$  

Fill in the Blanks

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