MATH 6 Q1 W1

1. ADDITION AND SUBTRACTION
OF
FRACTIONS
QUARTER 1 WEEK 1
MATH 6
SHARMAIN A. CORPUZ
Prepared by:

2. MATH 6
OBJECTIVES:
• Add and subtract simple fractions and mixed numbers
without and with regrouping
a. add and subtract similar fractions
b. add and subtract dissimilar fraction and
c. add and subtract mixed numbers

3. MATH 6
REVIEW
•WHAT IS FRACTIONS?
•WHAT IS A NUMERATOR?
•WHAT IS A DENOMINATOR?
•WHAT ARE THE 3 TYPES OF FRACTIONS?

4. MATH 6
Similar Fractions
are fractions with the same
denominators.
2 3 4
5 5 5

5. MATH 6
To add and subtract similar fractions:
1. Add or subtract the numerators.
2. Write the sum or difference over the common
denominator.
3. Simplify or write the answer to lowest term if
necessary.

6. MATH 6
Example:
4
5
+ =
1 3
5 5
=
1+3
5
2 1
3 3
- =
2-1
3
= 1
3

7. MATH 6
Try to answer:
6
9
+ =
5 1
9 9
=
5+1
9
=
2
3

8. MATH 6
Dissimilar Fractions
are fractions with different
denominators.
2 1
5 2

9. MATH 6
To add and subtract dissimilar fractions:
1. Determine the least common denominator (LCD)
2. Get the equivalent fractions using this denominator.
3. Add the numerators. Then write the sum or difference
over the common denominator.
4. Simplify or write the answer to lowest term if possible.

10. MATH 6
Example:
9
10
+ =
2 1
5 2
=
4+5
10
2 2
3 2
- =
6-4
6
=
2
6
=
1
3

11. MATH 6
Try to answer:
6
9
+ =
5 1
9 9
=
5+1
9
=
2
3

12. MATH 6
Mixed Fractions
are fractions that have a whole
number part and a proper fraction
part.
2 1
5 5
1 1

13. MATH 6
To add and subtract mixed fractions:
Add and subtract the whole numbers, then the fractions,
and express the answer in lowest term if possible.

14. MATH 6
Example:
=
2 2/5 + 1 1/5
2+1
5
2 + 1 =
5 5
2+1 3
3
5

15. MATH 6
Try these:
+ =
5 1
9 9
1 2

16. MATH 6
Try these:
6
9
+ =
5 1
9 9
=
5+1
9
=
2
3
1 +2
1 2 3 3

18. or 5 plastic cup