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.
Adding and subtracting like fractions
Free lesson plan from HomeschoolMath.net
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Fractions that have the same denominator
are called like fractions. Fractions that have
a different
denominator are called unlike fractions. Write the answers
to the pictures.
Check with your teacher.
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1
4 |
and |
2
4 |
are like
fractions since they have the |
same denominator 4. Or in other words they
are
same kind of parts - fourth parts. |
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Adding same kind of parts is easy - just add the
_____________.
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Example problem types
1. Write the addition sentence and the answer. Give your final
answer as a mixed number if possible. Shade parts in the answer picture.
2. Shade parts and write an addition sentence for each problem.
 |
|
Shade |
5
8 |
. Shade another |
7
8 |
. |
|
 |
|
|
Shade |
3
5 |
. Shade another |
1
5 |
. |
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3. Add the fractions. Write your answer as a mixed number if possible.
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3
2 |
+ |
1
2 |
= |
|
|
4
7 |
+ |
4
7 |
= |
|
|
5
10 |
+ |
6
10 |
= |
|
|
2
14 |
+ |
6
14 |
= |
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4. Shade parts and cross out parts, and write a subtraction sentence for each problem.
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|
Shade 1 |
5
8 |
. Cross out |
7
8 |
. |
|
|
|
|
|
Shade |
5
5 |
. Cross out |
1
5 |
. |
|
5. Subtract like fractions. The principle is the same as in
adding: you just subtract the numerators.
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3
5 |
- |
1
5 |
= |
|
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6
7 |
- |
4
7 |
= |
|
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9
10 |
- |
6
10 |
= |
|
|
12
14 |
- |
6
14 |
= |
|
|
8
4 |
- |
|
= |
6
4 |
|
|
12
15 |
- |
|
= |
8
15 |
|
|
16
20 |
- |
|
= |
11
20 |
|
|
5
3 |
- |
|
= |
1 |
1
3 |
|
6. Make your own fraction problems! Make two different problems for
each answer.
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+ |
|
= |
5
4 |
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|
|
+ |
|
= |
5
4 |
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|
|
+ |
|
= |
5
5 |
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|
|
|
|
|
|
+ |
|
= |
5
5 |
|
|
|
+ |
|
= |
13
20 |
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|
|
+ |
|
= |
13
20 |
|
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7. Solve the addition problems, and write a corresponding subtraction
problem for each. Remember to use mixed numbers.
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2
10 |
+ |
6
10 |
= |
|
|
- |
|
= |
|
|
9
8 |
+ |
2
8 |
= |
|
|
- |
|
= |
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Next lesson: equivalent fractions
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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