Add and Subtract Fractions by Decomposing

How can you get 3/4?

• 1/4 + 1/4
• 2/4 + 1/4
• 1/4 + 1/4 + 1/4 + 1/4
• 3/4 + 1/4

Decompose the following fraction:
6/10

• 1/6 + 5/6
• 2/10 + 4/10
• 3/10 + 2/10
• 1/10 + 1/10 + 3/10

How can you decompose 4/7?

• 1/7 + 1/7 + 1/7 + 1/7
• 2/7 + 2/7
• 3/7 + 1/7
• all of the above

Decompose 5/12 into the sum of its unit fractions.

• 1/5+1/5+1/5+1/5+1/5 = 5/12
• 1/12+1/12+1/12+1/12+1/12 = 5/12
• 1/5+1/12+1/5+1/12+1/5 = 5/12
• 4/12+1/12 = 5/12

Decompose the following fraction:
5/8

• 1/8 + 1/8 + 1/8 + 2/8
• 3/8 + 2/3
• 1/8 + 3/8
• 8/2 + 8/3

How do you decompose 6/10 into a sum of unit fractions?

• 1/10 + 5/10
• 3/10 + 3/10
• 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10
• 4/10 + 2/10

Which of the following show how to decompose 6/12?

• 2/12 + 3/12
• 3/12 + 3/12
• 4/12 + 1/12
• 6/12 + 6/12

Brad ate 3/4 of his Kit-Kat bar and gave the rest to Zech.  How much of the Kit-Kat bar did Zech get to eat?

• 3/4
• 1/4
• 2/4
• None

Kyleigh made a giant cookie to eat for lunch. She ate 1/5 of it and felt sick.  She gave the rest of the giant cookie to Noelle.  How much of the cookie did Noelle have? 

• 4/5
• 1/5
• 3/5
• 5/5

Which of the following is NOT a way to decompose 9/12?

• 4/12 + 4/12 + 1/12

• 8/12 + 1/12

• 1/12 + 1/12 + 1/12 +1/12 + 1/12 + 1/12 + 1/12 + 1/12 + 1/12

• 7/12 + 1/12 + 2/12