25620526 Lesson Plan Grade 1 Addition of Two Digit Numbers

TCP (PRC License No. 1042051)

Lesson Plan (Grade 1): Addition of two-digit numbers

Value: Care for the Environment

I. Objective: At the end of the 30-minute period, 85% of the pupils should be able to:

1. identify the tens and ones in two-digit numbers 2. add two-digit numbers

3. color the activity sheet to make it clean and green II. Subject Matter

Addition of two-digit numbersReference

Elementary Mathematics pp 88-100Grade 1 Comprehensive Curriculum pp 376-401Mathivities pp 10-13Pictures, Worksheets, Manipulatives, Flashcards

III. Learning Experiences

Teacher's Activities Pupil's Activities

Good morning/afternoon class.

Now and forever.

Are you ready to start our session now?

Prayer leader, can you say the morning/afternoon prayer now?

Thank you (Prayer Leader).

Now, I want you to arrange your seats. Make sure you are still in line. Then, you may take your seats so we can start with our lesson.

Are you ready to listen now?

Good morning/afternoon Madam.Praised be Jesus and Mary.

Yes, Madam.

Yes, Madam. Are you ready classmates?

Yes, we are.

In the name of the Father....Hail Mary....Glory be...In the name of the Father...

Yes, Madam.

Yes, Madam.

1/




Review/Motivational: Addition of Ones

Do you know what is the Ones digit?Let’s review simple addition of the Ones.

(Mental activity, use flashcard or Math transparency)

That's right!

Review/Motivational: Tens and Ones

Can you remember the tens and the ones, class?

(use transparency on the tens and ones)(have a mental activity)

Two-digit numbers such as 20 is composed of tens and ones. For example:

Tens Ones

2 0

20

Can you identify the tens and ones in this number?

10

Raise your hand if you want to answer which one is the tens and which one belongs to the ones place. Very good!

Let’s move on to the next activity.

(5 exercises for each activity)

(answers will vary)

Thank you, Madam.

(answers will vary)

2/




Motivation: Word problem for students to think about with background pictures of schoolchildren in the schoolyard. This is also to encourage the students to keep their environment clean and green. The whole class will try to answer the problem with the teacher to guide them.

Now, I have problem here that I want you to solve. The word problem is also in line with our objective on how to care for our environment.

Here is the problem. Please read aloud, together.

Mrs. Juana brought her class to the schoolyard for their Work Education time. There were 20 boys and 24 girls. How many children were in the yard?

What is being asked by the problem?

That's right!What do you think they’re doing in the schoolyard?

(students read aloud)

(answers may vary)

How many children were in the yard.

(answers will vary)

3/




Presentation: Number Sentence

From the given problem, you can write down a number sentence from the given numbers.

(demonstrate the operation using manipulatives)

Anyone of you can tell what 20 means? Raise your hand if you want to answer?

That's right.

How about 24? Another student who wants to try?

That's right.

So, what are you going to do with 20 and 24?

That's right! Can you show us how to do it?

Please come to the board.

20 stands for boys.

24 stands for girls.

Add them to get the sum of the total number of children in the yard.

(a student volunteers)

4/

20+24=___




Solve the Problem

(if students were not able to solve, teacher will demonstrate)

This is one way to solve the problem.

Step 1: Add the Ones

Step 2: Add the Tens

Or

How many children were there?

That's correct!

Thank you children for your effort.

Now, I have some exercises for you to do. I want you to answer them mentally.

Ready?

There were 44 children.

Ready, Madam.

5/

Tens Ones

2 0

+ 2 4

4 4

Tens Ones

2 0

+ 2 4

4

20+24------ 44




Exercises on Adding Two-Digit Numbers (Written on Flashcards)

Remember: Add the ones first, then the tens.

Good!

Let’s try another set.

Ready?

49

39

59

Ready, Madam.

6/

Tens Ones

1 2

+ 3 7

Tens Ones

2 3

+ 1 6

Tens Ones

1 4

+ 4 5




Very good!

7/

20+ 24

-------

27+ 11-------

29+ 20-------

44

38

49



Teacher’s Activities Pupil’s Activities

What can you say about addition of two-digit numbers?

Ok.

We can now make a rule about addition of two-digit numbers.

So, what are the steps in adding two-digit numbers?

GeneralizationIn adding two-digit numbers:1. Add the Ones first before the Tens.2. Add the numbers in the Tens column to get the final answer.

Did you get it?

ApplicationNow, I want you to try these exercises. Write the answer in your Math notebook.

Raise your pencils if your done.

What’s the answer in number 1…2…3?

Very good!

Now, I want you to answer these test questions.

(answers will vary)

8/

24 +12------

18 +50------

38+10------

36

68

48



Teacher’s Activities Pupil’s ActivitiesEvaluationGet your Math workbook and open it on page ____. Answer Problem #1 and #2. Write your answers in your Math notebook. I’ll go around to check on each one of you. Raise your pencils when you are done.

1. There are 23 mango trees and 16 kaimito trees. How many trees are there in all?

2. There are 14 santol seedlings and 20 sampaloc seedlings. How many seedlings are there altogether?

(after 7 minutes)

(teacher checks notebooks)

AssignmentFor your assignment, answer Problem 3 of page ___ in your Math workbook. You will have to submit the assignment tomorrow. Your parent or guardian will have to sign it too.

Directions: Write a number sentence for each and solve the problem.

#3. Barangay Sigla planted 30 gumamela plants, Bgy. Payapa, 35, and Bgy. Kasipagan, 30. How many gumamela plants did they plant in all?

Add the following:

54 + 20 = ____

45 + 13 = ____

34 + 25 = ____

Are you done?

Yes, Madam.

9/



Teacher’s Activities Pupil's ActivitiesClosureWhat do you remember about our lesson for today?

Very good!

Now stand up and arrange your tables and chairs for your next class. Pick up the pieces of paper and throw them in the trash can.

Are you all ready now?

Prayer leader, you may now proceed.

Goodbye class and see you tomorrow.

(answers will vary/Biblical scriptures can be cited)

Are you ready to pray classmates?

Yes, we are.

In the name of the Father....Amen.

Goodbye and thank you….

10/

Documents

25620526 Lesson Plan Grade 1 Addition of Two Digit Numbers