Adding and Subtracting Fractions

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

What is the least common denominator you could use to subtract 1/3 and 1/4?

• 3
• 4
• 24
• 12

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. 

Solve this problem using the least common denominator.
¼ + ½

• 3/4
• 2/8
• 6/4
• 6/8

What is the least common denominator of 1/2 and 3/7?

• 2
• 14
• 7
• 28

Joe has listed the first 4 multiples of 7 as: 
7   14    22     28
Which one is incorrect?

• 7
• 14
• 22
• 28

• 5/14
• 3/7
• 5/7
• 5/14

8/10 + 3/5

• 11/15
• 1 1/5
• 14/15
• 1 4/10

3/6 + 10/12

• 1 1/12
• 13/18
• 1 4/12
• 13/12

1/4 + 5/8

• 2/8
• 6/12
• 3/4
• 7/8