Math 2 Lesson: Multiplication table 3 Bảng

### 1.1. Knowledge to remember

– Make a 3 times table and memorize the values in this multiplication table.

### 1.2. Math forms

**Form 1: Perform the calculation of 3 multiplied by a number.**

You perform additions with terms all equal to 3 to find the value of multiplying 3 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 some groups, we usually take the value of some groups with the number of groups.

– Presentation of the problem.

– Check the solution and the results you just found.

**Form 3: Counting by 3**

I add 3 consecutive units to complete the 3 way counting table.

### 1.3. Solving Textbook Exercises Page 97

**Lesson 1**

Mental arithmetic:

3 x 3 = 3 x 8 = 3 x 1 =

3 x 5 = 3 x 4 = 3 x 10 =

3 x 9 = 3 x 2 = 3 x 6 =

3 x 7 =

__Solution method__

Read the multiplication table by 3 and then fill in the blanks with the results.

__Solution guide__

3 x 3 = 9 3 x 8 = 24 3 x 1 = 3

3 x 5 = 15 3 x 4 = 12 3 x 10 = 30

3 x 9 = 27 3 x 2 = 6 3 x 6 = 18

3 x 7 = 21

**Lesson 2**

Each group has 3 students, there are 10 such groups. How many students are there in all?

__Solution method__

**Summary**

1 group: 3 students

10 groups:….students?

**The answer**

To find the solution, multiply the number of students in a group by 10.

__Solution guide__

The 10 groups with all students are:

3 x 10 = 30 (students)

Answer: 30 students.

**lesson 3**

Fill in 3 and then write the appropriate number in the blank:

__Solution method__

Add 3 units to the previous number in turn to find the value of the next number to fill in the blank.

__Solution guide__

### 1.4. Textbook exercise solution page 98

**Lesson 1**

Number ?

__Solution method__

Mentally calculate the value of the multiplication table by 3 and then fill in the result in a circle.

__Solution guide__

**Lesson 2**

Write the correct number in the dot (follow the pattern):

__Solution method__

Find a missing factor of multiplication by mentally multiplying 3 by any number that equals the given product.

__Solution guide__

**lesson 3**

Each can holds 3 liters of oil. How many liters of oil can 5 such cans hold?

__Solution method__

**Summary**

1 can: 3l

5 cans:….l?

**The answer**

To find the answer we multiply the number of liters a can can hold by the number of cans.

__Solution guide__

5 such cans can hold the number of liters of oil:

3 x 5 = 15l

Answer: 15l

**Lesson 4**

Each bag contains 3kg of rice. How many kilograms of rice are there in 8 such bags?

__Solution method__

**Summary**

1 bag: 3kg

8 bags: ….kg?

**The answer**

To find the solution, multiply the number of kilograms in a bag by the number of bags.

__Solution guide__

8 such bags can hold the number of kilograms of rice:

3 x 8 = 24 (kg)

Answer: 24 kg

**Lesson 5**

Number?

a) 3; 6; 9 ;…;….

b)10; twelfth; 14; …;….

c) 21; 24; 27;…..;….

__Solution method__

Count by 2 or 3 and then fill in the missing numbers.

__Solution guide__

a) 3; 6; 9; twelfth; 15.

b) 10; twelfth; 14; 16; 18.

c) 21; 24; 27; 30; 33.

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