Add and subtract unlike denominator

Andrew ran $\frac{1}{3}$ of a mile and swam  $\frac{5}{6}$ of a mile. How much farther did he swim than run?  

•  $\frac{5}{18}$  of a mile

•  $\frac{1}{2}$  of a mile

•  $\frac{4}{3}$   of a mile

•  $\frac{3}{6}$   of a mile

• 1
• 3/6
• 1/2
• 2

What is the least common denominator for 6/7 and 1/2?

• 12
• 14
• 7
• 6

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

• 1/9
• 11/9
• 5/9
• 7/12

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

To put a fraction in simplest form, you will need to do this to the numerator and denominator

• subtract both by same number

• divide both by the same number

• add the same number to both

• multiply both by the same number

The number on the top of a fraction is called what?

• numerator
• denominator
• fractionator
• equivalent

What is the least common denominator for 1/3 and 3/4?

• 6
• 4
• 3
• 12

 $\frac{2}{5}-\frac{1}{4}$  

• 1

•  $\frac{2}{20}$  

•  $\frac{3}{20}$  

•  $\frac{3}{4}$