adding subtracting rational numbers

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

• 5/14
• 3/7
• 5/7
• 5/14

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

• numerator
• denominator
• fractionator
• equivalent

What do you need to have when adding unlike fractions?

• common denominator
• common numerator
• common numerator and denominator

Solve

• 5/10

• 7/10

• 1/8

• 10/8

• 1

What is the sum of these fractions?

• 4/5
• 3/20
• 17/20
• 4/20

• 1/12
• 1
• 2/35
• 23/25

Which fraction equals 1?

• 8/8

• 1/11

• 3/4

• 5/6

12.9 + 2.9 

• 15.8 
• 12.8
• 15.0
• 7.9999