KHRISLA E. CONCEPCION MAY 9, 2012
BSE-MATH PRINCIPLES IN TEACHING2
A DETAILED LESSON PLAN IN MATHEMATICS – SECONDARY I. OBJECTIVES
Upon the Completion of this lesson, the student should able to;
Solve problems involving adding and subtracting integers
Construct a vertical and horizontal number line
Student will have a determination and patience in learning mathematics
II. SUBJECT MATTER
A. Learning Integers – Addition and Subtraction B. Reference: College Algebra Book for High School
C. Materials: White Board or Black Board for Board Work; white board marker or
chalk; work sheet.
D. Values: Let the student to have Determination and Patience. III. PROCEDURE
TEACHER’S ACTIVITY STUDENT’S ACTIVITY
A. Preliminary Activity:
- Good Afternoon Class - Let us pray
- Check the attendance B. Motivation/Review
- What is our lesson yesterday?
- Very good, does anyone can define what integer is? - Is zero an integer?
- Can you give an example of integers?
- Good Afternoon Ma’am
- One student will lead the prayer (Our Father…)
- Student’s will raise their hands once called
One student raises hand
- Our lesson yesterday is about
integers.
- Integer is a set of whole number
and it’s opposite.
- Yes it is an integer - All students will give an
- Ok now you what is integers we will have a game, everyone will participate.
- Everyone will be given a question about integers. Example: write an integer that will represent each situation
10 degree above zero.
A loss of 100 peso
Gain of 10 pounds
12 step forward
25 ft below sea level
- Very good class, now we will proceed to our lesson. Get your pen and notebook for our lecture. C. Presentation
- Does anyone know how to add and subtract numbers?
- How about adding integers? - Anyways our lesson for today is
about adding and subtracting integers. Does anyone among you know the rule in adding integers?
- Very well said, how about adding two integers with unlike sign. - Any idea class? Any ways these
are the rule in adding the two integers having unlike sign: - When you are adding two integers
with different signs is like
subtracting two numbers and you take the sign of the larger.
+10
-100
+10
+12
-25
- Everyone will get their
materials
- Yes
- No one will answer
- Some student will raise their
hands and answer the question
- If the integers have the same
sign just add the integers and copy it’s sign
- No one will answer
- I will give some examples: if we add 12 to -3 the answer will be 9. Why 9, because 12 has a greater value we should change the + into – sign. Another example, if we add +3 to – 5 the answer will be -2.
- Now it is your time to solve some in the board. (Will give some exercises to answer thru board work.)
- Now we know how to add
integers we will now study how to subtract integers.
- Here are the rules in subtracting integers.
1. If the two integers are both in negative sign (-) simply add the integers.
Example: -2 – 3 = -5
2. If they have different sign subtract them and copy the sign of the integers that has a greater value.
Example: -9 – + 3 = -6 -2 – +5 = +3
- Now let’s try to answer some examples, anyone who wants to answer on the board?
- That’s the end of our lesson for today; tomorrow we will have a short review about our lesson today.
- Student will answer in board.
- One student will raise hand to
IV. EVALUATION
Distribute the Work Sheet about the lesson. (Work sheet is attached)
V. ASSIGNMENT
Know the rules of multiplying and dividing integers.
Worksheet in Mathematics Integers
NAME: ___________________________________ DATE: _____________________________ YEAR AND SECTION: ________________________ SCORE: ____________________________
I. ADD THE FOLLOWING INTEGERS:
1. +9 + (+12) = 2. +2 + (-1) = 3. +15 + (+5) = 4. -3 + (- 7) = 5. +13 + (-3) = 6. +25 + (+12) = 7. +92 + (-23) = 8. +190 + (-130) = 9. +230 + (-132) = 10. 23 + 12 =
II. SUBTRACT THE FOLLOWING INTEGERS
1. (-98) - (+72) = 2. (+82) - (+32) = 3. (-96) - (+37) = 4. (-46) - (+78) = 5. (+99) - (+85) = 6. (-13) - (-17) = 7. (-49) - (-95) = 8. (-1) - (-41) = 9. (-77) - (+90) = 10. (-58) - (+42)
