Building and decomposing fractions

Jennifer made a giant cookie to eat for lunch. She ate 2/5 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

4/9 + __________ = 1

Think !! =)

Add.

 $\frac{1}{2}+\frac{1}{3}$  

•  $\frac{1}{5}$  

•  $\frac{2}{3}$  

•  $\frac{2}{5}$  

•  $\frac{5}{6}$  

 $\frac{5}{3}+\ \frac{5}{3}\ =\ 10\ \times\ _-$  

• 1/3

• 10/3

• 5/3

• 20/6

Add:

 $\frac{3}{8}+\frac{4}{8}$  

•  $\frac{7}{8}$  

•  $\frac{7}{16}$  

•  $\frac{1}{8}$  

•  $\frac{8}{8}$  

 $\frac{\text{1}}{\text{2}}+\frac{\text{1}}{\text{2}}$ 

•  $\frac{\text{2}}{\text{2}}$  

•  $\frac{\text{3}}{\text{4}}$  

• 55

• pizza

What are the possible fractions for 3/7

• 4/7 - 1/7 =

• 6/7 - 3/7 =

• 1/7 - 5/7 =

Which model represents the answer  $\frac{6}{15}$  ?

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What is the difference of the given problem?

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Which fraction does the model decompose?

• $\frac{5}{5}$

• $1\ \frac{1}{5}$

• $1\ \frac{2}{5}$

• $1\ \frac{3}{5}$