Math 2 Lesson: Multiplication table 4

### 1.1. Knowledge to remember

– Make and memorize the multiplication table 4

### 1.2. Math forms

**Type 1: Perform the calculation of 4 times a number**

You perform additions of 4s to find the value of multiplying 4 by a number.

**Form 2: Math quizzes**

– Read and analyze the problem: The problem often gives the same number of values, requires finding the value of some groups.

– Find the solution of the problem: To find the value of a number of groups, we usually multiply the value of a group by the number of groups.

– Presentation of the problem.

– Check the solution and the results you just found.

**Form 3: Counting by 4**

I add 4 units in a row to complete the counting table by way of 4.

### 1.3. Textbook Exercises Page 99

**Lesson 1**

Mental arithmetic:

4 x 2 = 4 x 1 = 4 x 8 =

4 x 4 = 4 x 3 = 4 x 9 =

4 x 6 = 4 x 5 = 4 x 10 =

4 x 7 =

__Solution method__

Mentally calculate the value of the table multiplying by 4 and then fill in the blanks.

__Solution guide__

4 x 2 = 8 4 x 1 = 4 4 x 8 = 32

4 x 4 = 16 4 x 3 = 12 4 x 9 = 36

4 x 6 = 24 4 x 5 = 20 4 x 10 = 40

4 x 7 = 28

**Lesson 2**

Each car has 4 wheels. How many wheels do 5 such cars have?

__Solution method__

**Summary**

1 car: 4 wheels

5 cars:….wheels?

**The answer**

To find the solution, multiply the number of wheels in a car by 5.

__Solution guide__

5 cars have wheel number

4 x 5 = 20 (wheel)

Answer: 20 wheels

**lesson 3**

Count by 4 and then write the appropriate number in the blank:

__Solution method__

Count down 4 units and then fill in the missing number in the blank.

__Solution guide__

Students count by 4 and fill in the blanks with numbers as follows

### 1.4. Solving Textbook Exercises Page 100

**Lesson 1**

Mental arithmetic:

a) 4 x 4 = 4 x 9 = 4 x 6 =

4 x 5 = 4 x 2 = 4 x 10 =

4 x 8 = 4 x 7 = 4 x 1 =

b) 2 x 3 = 2 x 4 = 4 x 3 =

3 x 2 = 4 x 2 = 3 x 4 =

__Solution method__

Mentally calculate the learned multiplication table value within 4 and then fill in the blank with the result.

__Solution guide__

a) 4 x 4 = 16 4 x 9 = 36 4 x 6 = 24

4 x 5 = 20 4 x 2 = 8 4 x 10 = 40

4 x 8 = 32 4 x 7 = 28 4 x 1 = 4

b) 2 x 3 = 6 2 x 4 = 8 4 x 3 = 12

3 x 2 = 6 4 x 2 = 8 3 x 4 = 12

**Lesson 2**

Calculation (according to the form):

**Sample: 4 x 3 + 8 = 12 + 8 = 20**

a) 4 x 8 + 10 =

b) 4 x 9 + 14 =

c) 4 x 10 + 60 =

__Solution method__

Do the calculation according to the model: Mentally multiply the value and then add the remaining number.

__Solution guide__

a) 4 x 8 + 10 = 32 + 10 = 42

b) 4 x 9 + 14 = 36 + 14 = 50

c) 4 x 10 + 60 = 40 + 60 = 100.

**lesson 3**

Each student can borrow 4 books. How many books can 5 students borrow?

__Solution method__

**Summary**

1 student: 4 books

5 students:…the book?

**The answer**

To find the answer, we multiply the number of books a student borrows by the number of students.

__Solution guide__

The number of books for 5 students to borrow are:

4 x 5 = 20 (book)

Answer: 20 books.

**Lesson 4**

Circle the letter in front of the correct answer:

4 x 3 = ?

A. 7

B. 1

C. 12

D. 43

__Solution method__

Think of the multiplication value in the multiplication table by 4 and then choose the correct answer.

__Solution guide__

We have: 4 × 3 = 12

**Circle the letter C**

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