Add Subtract Fractions Same Denominator

These are fractions with the same denominators

• similar fractions

• dissimilar fractions

• mixed fraction

• <
• >
• =

Add

The image represent an addition of:

• Like denominators fractions

• Unlike denominators Fraction

When Adding LIKE denominators fractions:

To find the denominator, you need to

• The denominator remain the same

• Cross multiply the denominators

• Multiply denominator

• Add denominators

What must you have to add and subtract fractions?

• Common numerators

• Different numerators

• Different denominators

• Common denominators

What is the first step in solving this problem? 
⅘ + ½ =

• Add the top parts of the fraction

• Rewrite the fractions in the simplest form. 

• Find a common denominator. 

• Make each fraction into an improper faction. 

What is the the next step to finding this answer?

• Add the numerators (1+1=2)

• Multiply 12 X 1 for both fractions to find a new numerator
  

• Multiply to find each new numerator by the multiple used to get 12. (3 X1) (4 X 1)

• This is a mistake, you don't need to convert to twelfths

(-1/15) + (-3/5)

• -2/3

• 2/3

• 1/4

• -1/4