The ideas in this fraction lesson are taken from the Fractions 1 ebook. Only a few examples of each problem type are shown; you should make more problems of each kind for the student.
Part of a whole group revisited
Free lesson plan from HomeschoolMath.net
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One third of the twelve flowers are dark.
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1
3 |
of 12 is 4. |
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Example problem types
1. Remember? Find the asked parts of the whole group.
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1
3 |
of 12 apples is ___ apples. |
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2
3 |
of 12 apples is ___ apples. |
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3
3 |
of 12 apples is ___ apples. |
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1
5 |
of __ carrots is __ carrots. |
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2
5 |
of __ carrots is __ carrots. |
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3
5 |
of __ carrots is __ carrots. |
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Fill in the table. Discuss with your teacher.
| To find |
1
2 |
of a number you need to _______________________________________ |
| To find |
1
3 |
of a number you need to _______________________________________ |
| To find |
1
4 |
of a number you need to _______________________________________ |
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Two fifths of the twenty berries are colored.
We can see it is eight berries.
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1
5 |
of 20 berries is __. |
2
5 |
of 20 berries is ____. |
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What is the relationship between the two answers above?
__________________________
| What is the relationship between |
1
5 |
and |
2
5 |
? __________________________________ |
| Give a rule to calculate |
2
5 |
of any given number if you already know |
1
5 |
of the given number: |
_____________________________________________________________________
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2. Fill the missing parts. Use the top problem to help you solve
the bottom one.
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1
4 |
of 12 is __. |
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3
4 |
of 12 is __. |
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1
6 |
of 12 is __. |
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2
6 |
of 12 is __. |
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1
5 |
of 10 is __. |
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3
5 |
of 10 is __. |
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3. Fill in the missing parts.
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3
7 |
of 21 is __. |
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2
9 |
of 36 is __. |
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4
5 |
of 30 is __. |
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9
10 |
of 90 is __. |
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7
9 |
of 54 is __. |
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2
5 |
of 45 is __. |
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4. Can you figure these out? It requires some 'reverse thinking'!
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1
2 |
of ___ is 6. |
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1
3 |
of ___ is 18. |
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1
5 |
of ___ is 10. |
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9
10 |
of ___ is 45. |
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2
3 |
of ___ is 12. |
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3
5 |
of ___ is 15. |
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5. Solve how much is left or how much was in the beginning!
a. There were 16 apples. Rhonda ate 1/4 of them. How many
are left?
b. Mom used 1/3 of the 12 eggs. How many are left?
i. Ken sold 3/5 of his marbles, and now he has 14 left. How many did
he have originally?
j. Of Tim's stone collection 1/5 are white stones. He has total of
75 stones. How many of them are not white?
How many cookies?
| a. Mom baked cookies, and gave 1/2 of them
to Beth, and of the remaining ones, she gave
2/3 to Seth. The rest, which was 4 cookies, she ate herself. How many did she bake originally? |
b. This time Mom baked again cookies, and gave 1/2 of them to Beth, and of the remaining ones she gave 1/3 to Seth. Then there were left 2 cookies. How many
did she bake originally? |
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Next lesson: Measuring in Inches
The ideas in this fraction lesson are taken from the Fractions 1 ebook sold on this website.
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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