Addition of Fractions with Unlike Denominator

The image is showing process is to add unlike denominators fractions:

TRUE or FALSE

• TRUE

• FALSE

What is the strategy to add fraction with unlike denominators?

• Smiley face

• XD

• Butterfly rule

• Cross multiplying

When Adding UNLIKE denominators fractions: To find the denominator, you need to

• Multiply numerators

• Cross multiply the denominators

• Multiply denominators

• Add denominators

What is the sum of these fractions in lowest terms?

• 4/5

• 3/20

• 17/20

• 4/20

What is the sum of these fractions?

• 4/5

• 3/20

• 17/20

• 4/20

When Adding UNLIKE denominators fractions:

To find the numerator, you need to

• The denominator remain the same

• Cross multiply the denominators and add the results

• Multiply denominator

• Add numerators

Add

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

Is this a correct answer?

• Yes, the student correctly added.

• No, you cannot add unlike denominators

• No, 5 + 7 is not 12

• No, 2 + 3 is not 5