Problem Solving Lesson in Math Grade 4

1. Mathematics

2. Give the answer as fast as you can.
40 x 9 = _____
50 x 30 = _____
20 x 700 = _____
600 x 8 = _____
400 x 30 = _____
20 x 90 = _____
500 x 8 = _____
60 x 20 = _____
40 x 9 = 360
50 x 30 = 1 500_
20 x 700 = 14, 000
600 x 8 = 4 800
400 x 30 = 12 000
20 x 90 = 1 800
500 x 8 = 4, 000
60 x 20 =1 200

3. Group Work: Picture Puzzle

4. What picture have you formed?

5. Judy and her dog run on the
beach every morning.

6. They run 8 kilometers daily. If
they have been running for 35
days now, how many
kilometers have they already
ran?

7. How do we solve the problem?
1. What is asked?
The total distance in kilometer
ran by Judy and her dog.

8. How do we solve the problem?
2. What are given?
8 kilometers daily, 35 days

9. How do we solve the problem?
3. What is the operation to be
used?
Multiplication

10. How do we solve the problem?
4. Write the number sentence.
35 x 8 = N

11. How do we solve the problem?
Perform the operation and write
the complete answer.
35
x 8
4
028 Kms. –the total distance ran by Judy and
her dog in 35 days

12. Let’s try another one:
Each sack of rice costs P1,
250. How much will a retailer
pay for 20 sacks?

13. How do we solve a word
problem?
1. Know what is asked.
2. Find the given.
3. Determine the operation to be used
4.Write the number sentence
5. Perform the operation and write
the complete answer

14. Solve the problem following
using the steps in problem
solving.
1. Mang Kardo’s rice mill
business earns an average of
P 106, 000 a month. How
much does it earn in 12
months?