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The ideas in this fraction lesson are taken from Math Mammoth Fractions 1 book. Only a few examples of each problem type are shown; you should make more problems of each kind for the student.

A fractional part of a group 2
Free lesson plan from HomeschoolMath.net

One third of twelve
flowers is four flowers.

1

3

  of 12 is 4.

To find a third part, you can
use division: 12 ÷ 3 = 4.

One half of twelve
fish is six fish.

1

2

 of 12 is 6.

To find a half, you can
use division: 12 ÷ 2 = 6.
To find 

1

2

 of a number, divide by ______. To find 

1

3

 of a number, divide by ______.
To find 

1

4

 of a number, divide by ______. To find 

1

5

 of a number, divide by ______.

1.Figure out these parts using division.

a.  

1

3

  of 18 is ____.

18 ÷ 3 = ____
b.      

c. (available in the book)

d.  

1

3

  of 15 is __

___ ÷ ___ = ____

    

 

    

We can see that

1

5

 of 20 berries is 4 berries.
We also see that 

2

5

 of 20 berries is double that, or 8 berries.
Similarly,

3

5

of 20 is three times 4, or 12.

2. Fill in the missing parts. Use the top problem to help you solve the bottom one.

a. 

1

4

 of 12 is __.

3

4

 of 12 is __.
b. 

1

6

 of 12 is __.

2

6

 of 12 is __.
     


3. Fill in the missing parts.

a. 

1

7

 of 28 is __.

3

7

 of 28 is __.
b. 

1

9

 of 18 is __.

2

9

 of 18 is __.
     

4. Continue the patterns!

1

7

 of 21 is 3.

2

7

 of 21 is __.

3

7

 of 21 is __.

 

 

 of 21 is __.
 
  		of 21 is __.

  
 

of 21 is __.

  
 

of 21 is __.

1

5

 of 20 is 4.

2

5

 of 20 is __.

3

5

 of 20 is __.

 

 

 of 20 is __.
 
  		of 20 is __.
     

5. Solve how much is left or how much there was in the beginning! The bar models can help.

    a. There were 16 apples. Rhonda ate 1/4 of them.
        How many are left?
 

    b. (available in the book)
 

    c. (available in the book)


    d. (available in the book)
 

    e.  Mom used 2/3 of the eggs she had, and now she
         has 2 eggs left. How many did she have originally?

 

Next lesson: Measuring in Inches

The ideas in this fraction lesson are taken from Math Mammoth Fractions 1 book. Only a few examples of each problem type are shown; you should make more problems of each kind for the student.

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New! Times Tales is now on DVD!

The fast, FUN, and easy way to learn multiplication. Learn the upper times tales in two sittings using mnemonic stories.
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