DLP Addition and Subtraction of Fractions
DLP Addition and Subtraction of Fractions
DLP Addition and Subtraction of Fractions
Department of Education
Region IV – A CALABARZON
Division of Batangas
District of Lipa
Lodlod Integrated National High School
Lodlod, Lipa City
I. LEARNING OBJECTIVES
At the end of the class, students are expected to:
1. Recall
(a) similar and dissimilar fraction,
(b) converting mixed number to improper fraction
(c) getting LCD
2. Add and subtract fractions and mixed number.
3. Show camaraderie in performing activities.
2. Greetings
Good morning class!
Good Morning ma’am
Grade 7- Mars, how are you today?
(student’s answer may vary)
3. Classroom Management
Before you take your seats, let us have a
MATH check.
M- ake your day great.
A- lign your chair properly and pick up the
mess under your seat
T- ake a deep breath
H- ave your seat and listen carefully
4. Checking of Attendance
Is there any absentee for today? (students’ answer may vary)
B. Priming
So, class, are you familiar with the
letters of the alphabet? Yes Ma’am
1 4 4 9 20 9 15 14
1 14 4
19 21 2 20 18 1 3 20 9 15 14
15 6
6 18 1 3 20 9 15 14 19
A D D I T I O N
Class, who among you can fill up the boxes
1 4 4 9 20 9 15 14
with their designated letter? I need at least
A N D
five students.
1 14 4
S U B T R A C T I O N
19 21 2 20 18 1 3 20 9 15 14
O F
15 6
F R A C T I O N S
6 18 1 3 20 9 15 14 19
For example:
8 3
1. and
5 5
Is that clear?
3 1
1.) +
5 5
Very good!
3 1 3+1 4
+ = =
5 5 5 5
5 1
And it is the same in subtracting similar -
12 12
fraction class, we simply subtract the
numerators and copy the common 5−1
=
denominator. Reduce the resulting fraction to 12
its simplest form, if possible. We have, 4 1
= or
12 3
5 1
2.) -
12 12
1 2
3.) 4 +1
3 3
1 2
Is 4 +1 a have the same denominator?
3 3
Very good!
1
4 when we converted to improper fraction
3
13
is because 3 multiplied to 4 is 12 plus 1 is
3
equals to 13, then copy the denominator
which is 3.
2
1 when we converted to improper fraction
3
5
is .
3
1 1
4.) 4 - 1
5 5
1 1
5.) +
4 2
Very good!
Fifteen (15) Ma’am
In adding dissimilar fraction, the first thing to
do is to find the LCD of it. Take a look at the
denominator of two fractions, we have 4 and
2. The LCD of 4 and 2 is 4.
1 1 1+ 2 3
+ = =
4 2 4 4
Very good!
2 2 10−6 4
- = =
3 5 15 15 Four (4) Ma’am
3 1
7.) 2 +1
4 2
3 1
Who among you can convert 2 and 1 into
4 2
improper fraction?
Yes Ma’am
Second is to find the LCD, and we can
proceed in addition. 3 15
3 =
4 4
What is the LCD of 4 and 2? 3 19
2 =
8 8
Very good!
3 3
8.) 3 -2
4 8
3 3
Convert 3 and 2 into improper fraction.
4 8
1. In adding and subtracting similar fraction,
Is there anyone of you can convert this in to simply add or subtract the numerator and copy
improper fraction? the common denominator.
3 3 15 19
3 -2 = -
4 8 4 8
30−19
=
8
11 3 3. Yes Ma’am
= or 1
8 8
B. Analysis
C. Abstraction
To add or subtract similar fractions, we
simply add or subtract the numerators and
copy the common denominator. Reduce the
resulting fraction to its simplest form.
D. Application
8 3
1. -
9 9
2 6
2. +
5 10
1 2
3. 8 - 1
4 3
103 3
4. +
120 120
5 5
5. 3 - 2
9 6
IV. EVALUATION
To test if you truly understand our lesson for today, let us have an individual quiz.
V. ASSIGNMENT
Solve the following:
1 2 7 1
1. + 6. −
3 3 10 3
5 1 11 7
2. + 7. −
8 4 12 12
7 2 8 7
3. + 8. −
8 3 9 8
2 4 13 1
4. 5 +3 9. 1 −3
3 5 17 12
9 1 1 1
5. 7 +1 10. 13 - 11
10 10 2 2
Prepared by: