Thirteen, fourteen, fifteen

### 1.1. Knowledge to remember

– Recognize that each number 13, 14, 15 consists of a tens and a unit number 3, 4, 5

+) Number 13 includes 1 tens and 3 units.

+) Number 14 includes 1 tens and 4 units

+) Number 15 includes 1 tens and 5 units.

– Read and write numbers within 15

### 1.2. Mathematical forms about Thirteen, fourteen, fifteen

**Form 1: Count the pictures and write the corresponding number.**

– Count the number of given images and write the corresponding number.

+) 1 dozen add 3 units to make 13.

+) 1 dozen add 4 units to make 14.

+) 1 dozen add 5 units to make 15.

**Form 2: Fill in the appropriate number in the number line.**

I determine the distances divided on the number line, equidistant from several units and then count and fill in the corresponding numbers.

**Form 3: Numbers before, numbers after.**

– The preceding digit of a number is the number immediately preceding that number and is 1 unit less than that number.

– The next digit of a number is the number immediately after that number and is 1 unit more than that number.

### 1.3. Solving Textbook Exercises

**Lesson 1 page 103**

Write numbers

a) Ten, eleven, twelve, thirteen, fourteen, fifteen.

…………………………… ……

b)

__Solution method__

– Write numbers from the given number readings.

– Count the numbers forward from 10 to 15 and vice versa and then fill in the missing number in the blank.

__Solution guide__

a) 10, 11, 12, 13, 14, 15.

b)

**Lesson 2 page 104**

Fill in the blanks with the correct number:

__Solution method__

Count the stars in the picture and fill in the blanks with the correct number.

__Solution guide__

**Lesson 3 page 104**

Match each picture with an appropriate number (follow the pattern):

__Solution method__

Count the number of animals in each picture and then match the box with the appropriate number.

__Solution guide__

**Lesson 4 page 104**

Enter a number under each line of the number line:

__Solution method__

Count the numbers from 0 to 15 and then fill in the missing number in the blank.

**Solution guide**

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