Adding fractions

Find the sum.
1/2 + 2/5

• 3/7
• 3/10
• 9/10
• 1  1/10

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. 

1/6 + 1/12

• 3/12

• 3/8

• 2/12

• 1/4

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

7/18 + 1/3

• 8/18

• 13/18

• 8/21

• 2/6

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

• 6
• 4
• 3
• 12

Are the following two fractions equivalent?
3/5 and 6/9

• yes
• no

Which fraction is not equivalent to 1/3?

• 2/6
• 3/9
• 4/12
• 3/15

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