Math Class 1

# Numbering

Numbering In this lesson, you will remember the numbering of numbers within twenty. By solving interesting examples, you will repeat the material studied earlier. The proposed fun tasks will remind you of ascending and descending counting, you will practice comparing numbers, remember the composition of two-digit numbers.

### Assignment for the numbering of numbers

In this lesson, we will repeat the numbering of numbers within twenty.

Let’s do a few things on this topic.

Assignment for the numbering of numbers.

Count from one to twenty (Figure 1).

Rice. one

Answer: 1 – one, 2 – two, 3 – three, 4 – four, 5 – five, 6 – six, 7 – seven, 8 – eight, 9 – nine, 10 – ten, 11 – eleven, 12 – twelve, 13 – thirteen, 14 – fourteen, 15 – fifteen, 16 – sixteen, 17 – seventeen, 18 – eighteen, 19 – nineteen, 20 – twenty.

What number follows the number 5 (fig. 2)?

Rice. 2

What number follows the number 8 (fig. 3)?

Rice. 3

What number follows the number 10 (fig. 4)?

Rice. four

What number follows the number 13 (fig. 5)?

Rice. 5

What number follows the number 18 (fig. 6)?

Rice. 6

Name the previous number five (Fig. 7).

Rice. 7

What is the previous number seven (Fig. 8).

Rice. eight

What is the previous number nine (Fig. 9).

Rice. 9

What is the previous number twelve (Fig. 10).

Rice. ten

What is the previous number fifteen (Fig. 11).

Rice. eleven

Name the number between the numbers 3 and 5 (Fig. 12).

Rice. 12

Name the number between the numbers 7 and 9 (Fig. 13).

Rice. 13

What is the number between 11 and 13 (Fig. 14).

Rice. fourteen

What is the number between 17 and 19 (Fig. 15).

Rice. fifteen

What is the number between 18 and 20 (Fig. 16).

Rice. 16

Name the neighbors of the number 4 (Fig. 17).

Rice. 17

Answer: numbers 3 and 5.

Name the neighbors of the number 8 (Fig. 18).

Rice. eighteen

Answer: numbers 7 and 9.

Name the neighbors of the number 13 (Fig. 19).

Rice. 19

Answer: numbers 12 and 14.

### Assignment for the arrangement of numbers in ascending and descending order

Assignment for the arrangement of numbers in ascending and descending order.

Arrange the numbers in the figure in ascending order (Fig. 20).

Rice. twenty

Answer: 1, 4, 5, 8, 9 (Fig. 21).

Rice. 21

What numbers are missing (fig. 22)?

Answer: 2, 3, 6, 7, 10.

Arrange the numbers in descending order (Fig. 23).

Rice. 23

Answer: 19, 18, 17, 14, 12, 10 (Fig. 24).

Rice. 24

What numbers are missing (fig. 25)?

Rice. 25

Answer: 20, 16, 15, 13, 11.

### Number comparison task

Let’s repeat the comparison of numbers.

The task of comparing numbers.

Use the greater than, less than, or equal to signs.

3 < 4, three is less than four;

9 > 6, nine is greater than six;

13 < 18, thirteen less than eighteen;

12 = 12, twelve equals twelve;

18 < 20, eighteen less than twenty.

### Quest about Snow White and the Dwarfs

Count all the gnomes (fig. 26).

Rice. 26

Answer: there are 7 gnomes in the picture.

Snow White sewed new caps for the dwarves.

Name the color of the cap of the first dwarf (Fig. 27).

Rice. 27

Name the color of the cap of the fourth dwarf (Fig. 28).

Rice. 28

Name the color of the cap of the seventh dwarf (Fig. 29).

Rice. 29

How many gnomes are standing in front of the third one (fig. 30)?

Rice. thirty

How many gnomes are behind the fifth (fig. 31)?

Rice. 31

How many gnomes are between the third and the seventh (fig. 32)?

Rice. 32

Let’s remember what numbers are called single-digit and double-digit.

### Single digit definition

Single digit numbers are numbers that use one digit.

### Definition of a two-digit number

Two-digit numbers  are numbers that use two digits.

### Task for single and double digit numbers

Task for single and double digit numbers.

Divide the numbers into two groups – one-digit and two-digit (Fig. 33).

Rice. 33

Answer: single digits are the numbers 5, 4, 1, 3, 7.

What other single digits are there?

Answer: 2, 6, 8, 9 (Fig. 34).

Rice. 34

List two digit numbers.

Answer: 12, 20, 15, 13, 18.

What other two-digit numbers are there within twenty?

Answer: 10, 11, 14, 16, 17, 19 (Fig. 35).

Rice. 35

### Task for the composition of two-digit numbers

Two-digit numbers are made up of tens and ones.

Task for the composition of two-digit numbers.

Name the numbers consisting of the following numbers (Fig. 36).

Rice. 36

Answer: 1 ten 3 ones = 13

1 tens and 6 units = 16

2 tens = 20

Name the numbers consisting of the following numbers (Fig. 37).

Rice. 37

Answer: 1 ten 8 units = 18.

1 ten 1 unit = 11.

1 ten 5 ones = 15.

Name how many tens and how many units in numbers (Fig. 38).

Rice. 39

Answer: 14 = 1 ten 4 units.

12 = 1 ten 2 units.

19 = 1 ten 9 units.

After studying this lesson, you remembered the numbering of numbers within 20, one-digit and two-digit numbers, the composition of a two-digit number. Solved tasks for the arrangement of numbers in ascending and descending order, for comparing numbers, will help you in your further study of mathematics.

Bibliography

1. Aleksandrova L. A., Mordkovich A. G. Mathematics 1st grade. – M: Mnemosyne, 2012.
2. Bashmakov M. I., Nefedova M. G. Mathematics. 1 class. – M: Astrel, 2012.
3. Bedenko M. V. Mathematics. 1 class. – M7: Russian word, 2012.

1. Internet portal “opitraboti.blogspot.com” ( Source )
2. Education Workers Social Network ( Source )

Homework

1. Count from one to twenty in ascending and descending order.

2.

1. What number follows the numbers: a) 4, b) 7, c) 11, d) 16.
2. What number comes before the numbers: a) 7, b) 12, c) 14, d) 18.
3. Name the number between the numbers: a) 5 and 7, b) 9 and 11, c) 13 and 15, d) 17 and 19.
4. Name the neighbors of numbers: a) 8, b) 10, d) 16, e) 19.

Show the correct answers on the number line.

3. Compare the number of figures in the figure figures by putting the sign “<“, “>” or “=”.

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