Addition within 5

### 1.1. Knowledge to remember

– Table to add numbers in the range 5

– How to calculate and add numbers within 5 and apply them to real situations.

### 1.2. Maths on Addition within 5

**Form 1: Performing the calculation**

Calculate the value of additions within 5 by repeating the learned operations.

**Form 2: Write calculations for the figures.**

– Count the number of objects in each picture.

– Write the corresponding numbers and calculations.

**Form 3: Fill in the missing element in the addition.**

Repeat the addition of numbers with range 5 and fill in the missing numbers in the blanks.

### 1.3. Textbook Exercises Page 49

**Lesson 1 page 49**

Calculate:

4 + 1 = 2 + 3 = 2 + 2 = 4 + 1 =

3 + 2 = 1 + 4 = 2 + 3 = 3 + 1 =

**Solution method**

Mentally add numbers within 5 and then fill in the blanks with the result.

**Solution guide**

4 + 1 = 5 2 + 3 = 5

2 + 2 = 4 4 + 1 = 5

3 + 2 = 5 1 + 4 = 5

2 + 3 = 5 3 + 1 = 4

**Lesson 2 page 49**

Calculate:

__Solution method__

Add the numbers vertically and then fill in the blanks with the result.

__Solution guide__

**Lesson 3 page 49**

Number ?

4 + 1 = … 5 = 4 + … 3 + 2 = …. 5 = 3 + ….

1 + 4 = … 5 = 1 + … 2 + 3 = …. 5 = 2 + ….

__Solution method__

Mentally add additions within 5 and fill in the blanks with the missing numbers.

__Solution guide__

4 + 1 = 5 5 = 4 + 1 3 + 2 = 5 5 = 3 + 2

1 + 4 = 5 5 = 1 + 4 2 + 3 = 5 5 = 2 + 3

**Lesson 4 page 49**

Write the appropriate calculation:

__Solution method__

In each picture, count the number of objects in each section and then write the appropriate calculation.

__Solution guide__

### 1.4. Textbook Exercises Page 50

**Lesson 1 page 50**

Calculate:

1 + 1 = 2 + 1 = 3 + 1 = 4 + 1 =

1 + 2 = 2 + 2 = 3 + 2 =

1 + 3 = 2 + 3 =

1 + 4 =

**Solution method**

Add numbers within 5 and fill in the blanks with the result.

**Solution guide**

1 + 1 = 2 2 + 1 = 3 3 + 1 = 4 4 + 1 = 5

1 + 2 = 3 2 + 2 = 4 3 + 2 = 5

1 + 3 = 4 2 + 3 = 5

1 + 4 = 5

**Lesson 2 page 50**

Calculate:

**Solution method**

Vertically add numbers within 5 and then fill in the blank with the result.

**Solution guide**

**Lesson 3 page 50**

Calculate:

2 + 1 + 1 = 3 + 1 + 1 = 1 + 2 + 2 =

1 + 2 + 1 = 1 + 3 + 1 = 2 + 2 + 1 =

**Solution method**

Add the numbers from left to right.

__Solution guide__

2 + 1 + 1 = 4 3 + 1 + 1 = 5 1 + 2 + 2 = 5

1 + 2 + 1 = 4 1 + 3 + 1 = 5 2 + 2 + 1 = 5

**Lesson 4 page 50**

Enter the sign >; <; = in the dot:

3 + 2 …5 4…..2 + 1 2 + 3 ….3 + 2

3 + 1 …5 4 ….2 + 3 1 + 4…..4 + 1

**Solution method**

– Calculate the value of the sides.

Compare and then fill in the blanks with the appropriate mark.

__Solution guide__

3 + 2 = 5 4 > 2 + 1 2 + 3 = 3 + 2

3 + 1 < 5 4 < 2 + 3 1 + 4 = 4 + 1

**Lesson 5 page 50**

Write the appropriate calculation:

**Solution method**

Count the number of animals in each picture and then write the appropriate calculation.

__Solution guide__

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