Addition of Rational Numbers

lesson plan about rational numbers

1. Detailed Lesson Plan

I. Objectives
At the end of the lesson, 100% of the students with 85% level of proficiency should be able to:
a. Add rational numbers;
b. Create problems involving rational number; and
c. Solve real life problems by adding rational numbers.
II. Subject Matter
a. Topic: Addition of rational numbers
b. References: 21
st
Century MATHletes
c. Materials: Pictures
d. Values: Cooperation
III. Procedures
Teacher’s Activity Pupil’s/Student’s Activity
A. Preliminaries

a. Prayer

Let’s start our day with a prayer, Bruno please lead the
prayer.






b. Greetings

Goodmorning class!



How was your morning?



It’s great! You may take your seat


c. Checking of attendance

Attendance checker, is there any absentees today?



Excellent because of that let’s give ourselves a big
check clap!


d. Checking of assignment
Bring out your assignment notebook and exchange it
with your seatmate








“Lord in heaven, hear my prayer, Keep me
in your loving care. Be my guide in all I do.
Bless all those who love me, too.” Amen!






Goodmorning teacher!



Its good teacher, how about you?








Nobody is absent today teacher

2. Write your answer in the chalkboard
(Will call students to answer)










Very good!



e. Review of the previous lesson

What is our last lesson?



According to this ice cream diagram what is rational
numbers?










Very good! Can you give an example of rational
numbers?



Great!



























1. -3.52, -1.2, 1.75, 4.3
2. -11.7, -1.8, 1.89, 13.01
3. -2.5, -2.05, -1.05, 1.15
4. 6.08, 6.1, 6.14, 6.8
5. -3.62, -3.1, -2.54, -2.5
6. 3.8, 3.86, 4.07, 4.74










Rational numbers ma’am






Natural numbers, whole numbers and
integers are rational numbers. rational
number is a number that can be
expressed as the quotient or fraction p/q of
two integers, a numerator p and a non-
zero denominator q.



½, ¼, ¾…

3. B. Lesson Proper

1. Motivation



It’s elise’s birthday! And she invited us but before we can get
in, in the party you must grab a balloon, each balloon has an
equation that you need to answer at the end of her birthday
party.

(will distribute a balloon drawing with an equation)

2. Presentation of the Lesson



During the birthday party a clown perform a magic trick!
He has 1 colored paper he cuts it and set aside the half.
Then he cuts the other half into two pieces. He cuts the
first piece into four pieces and then the second one. He
gave it to Elise and ask her to form an equation out of it
then answer it and magic will going to happen but Elise
is having a hard time forming an equation so let’s help
her.

1 piece of colored paper is cut into four pieces; can you
figure what it is?




Very good! ¼ is a rational number! There are 2 pieces
of paper being cut, we can say that ¼ + ¼ = , what do
you think is the answer in this equation?





No idea? It is our topic for today’s lesson which is
addition of rational numbers.
















































¼







(No idea)

4. When you add rational numbers it is important to look at
the denominator. Where is the denominator in the
fraction ¼?



Excellent! Both of the denominator is 4.

1
4
+
1
4
=


When the denominator is similar you will just copy it

1
4
+
1
4
=
4


After that add the enumerator

1
4
+
1
4
=
1+1
4
=
2
4


After getting the answer you must get its lowest term

2
4
÷
2
2
=
1
2


Then what is the answer for the equation ¼ + ¼ = ?



Elise is very happy that we finally got the answer to the
equation, the clown will now perform the magic trick.

The party went well, let’s now sing happy birthday to
Elise!




Adding rational numbers, it is easy when the
denominator is similar but how about if it is different.
Take a look at this equation.

2
3
+
1
4
= ?

What is the denominator in this equation?



That’s right! And when the denominator is different, you
will not just copy it instead you need to multiply them

2
3
+
4
4
=
12


After that perform the cross multiplication

2
3
+
4
4
=
8+12
12


Then add the enumerator





4























½






(Children will sing happy birthday)











3 and 4

5. 2
3
+
4
4
=
8+12
12
=
20
12


The last step is getting the lowest term


20
12
÷
4
4
=
5
3


Then what is the final answer?



Very good! Now you have learned the addition of
rational number!


3. Application
a. activity 1
Form 4 groups. Arrange these banderitas to their
correct arrangement by answering the equation written
on it using addition of rational numbers.


b. activity 2
Find a pair and create a real life problem using rational
numbers then answer it. Show your solution.

c. activity 3
Take a look at the balloons that Elise gave and answer
each equation written on it, don’t forget to write your
name in the balloon.

4. Generalization

When adding rational numbers, we have a steps to
follow,

First, we should look at what?




That’s right, why should we look at the denominator
first?




Very good! If it is similar, what should we do in the
denominator?




That’s correct! after that what should we do in the
enumerator?















5/ 3






























Denominator



To see if it is different or similar






Copy





Add

6. Excellent! How about if the denominator is different,
what operation should we do?





Fantastic! And after than we perform the?




When we get the answer, is the step done?





Amazing! Now you totally learned about the addition of
rational number!





Multiplication





Cross multiplication




No ma’am, we should find if the answer
has a lowest term

IV. Evaluation:
Solve the following equation using addition of rational numbers.
1.
1
3
+
1
3
=
2.
�
�
+
�
�
=
3.
�
�
+
�
�
=
4.
�
�
+
�
�
=
5.
�
�
+
�
�
=
V. Assignment
Solve the problem. Show your solutions.
A recipe for trail mix calls for 3/4 cup dried fruits, 1/2 cup mixed nuts, and 1/3 cup granola. How
many cups of trail mix does this recipe make?


Name: Philipinarose R. Estiller
Course/Section: BEED 1
Instructor: Mr. Francis Paulo San Pedro