BANUANGAN ELEMENTARY SCHOOL
GODOD DISTRICT
LESSON PLAN IN MATHEMATICS 3
( Explicit Teaching with Differentiated Activities )
I-OBJECTIVE:
Multiply mentally 2-digit numbers by 1-digit numbers without regrouping with products up to 100
Value Focus:
Cooperation and independence, readiness to help others
Prerequisite skills:
Addition of 3-to-4 digit numbers without regrouping
II-SUBJECT MATTER:
Multiplying mentally 2-digit numbers by 1-digit numbers with products up to 100
A. Refences:
Teacher’s Guide, pp.161-163
Learner’s Material, pp.
B. Materials:
Flash cards, crayons and illustration board
C. Key Behavior Indicator: Listen attentively to the teacher while she is talking.
III- PROCEDURES:
A. Preliminary activities
1. Sing: “One and One two”
2. Drill: The teacher shows flash cards with basic multiplication facts.
B. Developmental Activities
1. Presenting the lesson
Post the problem on the board.
Four boys helped their teacher return some workbooks to the library.
Each boy carried 12 workbooks. How many workbooks did they carry altogether?
Think:
Multiply the ones by ones. Multiply the tens by ones.
Give the product.
12 12
x 4 x 4
8 48 The product is 48.
So, 48 workbooks were carried by the boys.
2. Performing the Activity
1. 13 2. 11 3. 21 4. 23
x 3 x 8 x 4 x 2
3 Processing the Activity
Ask: Who was able to give the answer first?
Was the answer correct?
What technique did you use that helped you compute the answer quickly?
Emphasize to the pupils that to multiply mentally 2-digit numbers by 1- digit numbers:
1. Multiply the ones by ones.
2. Multiply the tens by ones.
3. Give the product.
4 Reinforcing the Concept
Form two groups with 12 members. Flash combinations of numbers. The first one who
Can give the correct answer will have the chance to color the first shape in the house.
Repeat the process until the group had completed coloring the shapes in the house. The
first group complete coloring the house wins the game.
Prepare the following flash cards and houses.
GAME: Color the House
1 2 3 4
23 24 14 11
X 2 X 2 X 2 X 4
5 6 7 8
10 43 33 51
X 3 X 3 X 3 X 2
Group 1 Group 2
2 1 2 1
3 3
4 5 4 5
6 6
7 8 7 8
b. Ask: Have you experienced hunting treasures?
Do you want to experience it?
Answer Key:
22 x 2= 44 20 x 5=100 31 x 3=93 29 x 2=58
12 x 5=60 41 x 2=82 22 x 4=88 12 x 3=36
49 x 1=49 22 x 3=66 12 x 4=48
5 Summarizing the Lesson
What helped you answer the computation problems easily? How do you multiply mentally 2- digit
numbers by 1- digit number without regrouping?
To multiply mentally 2- digit numbers without regrouping
. Multiply the one by ones.
. Multiply the tens by ones.
. Give the product
6 Applying to New and Other Situations
Have pupils do the activity in the LM in groups with 4 members each. Provide each group with the
secret message activity.
12 13 23 11 12 13 13 26 20 22 23
X 5 x 2 x 2 x 4 x 3 x 2 x 3 x 1 x 3 x 2 x 3
50 26 46 44 36 26 39 26 60 44 69
I T S M A T H T I M E
IV. Evaluation
Let the pupils answer the following problems. Have them read each problem carefully then write
only the product in their own paper.
1. Elvie planted 3 lines of sampaguita plants. On each line there are 12 sampaguita plants. How
many sampaguita did she planted in all?
2. Francis planted an eggplant seed in 11 passages. Each passage contains 8 seeds. How many
seeds did he planted?
Answer key:
1. 36 sampaguita plants
2. 88 eggplant seedling
V. Assignment
Solve the following.
1. 11 2. 12 3. 23 4. 24 5. 13
X 7 x 2 x 3 x 2 x 3
