Class 1 Numbers

# Class 1 Numbers

## Numbers and Number Names

### One-digit Numbers

Numbers from 1 to 9 are called 1-digit numbers. We need one place or one digit to write one-digit numbers. Let’s write the number names of one-digit numbers.

 Numbers Number names 1 One 2 Two 3 Three 4 Four 5 Five 6 Six 7 Seven 8 Eight 9 Nine

### Two-digit Numbers

Numbers from 10 to 99 are called 2-digit numbers. We need two places and two digits to write two-digit numbers. The two places to write two-digit numbers are Ones place and Tens place. Let’s write the number names of two-digit numbers.

 Numbers Number names 10 Ten 11 Eleven 12 Twelve 13 Thirteen 14 Fourteen 15 Fifteen 16 Sixteen 17 Seventeen 18 Eighteen 19 Nineteen 20 Twenty 21 Twenty-one 22 Twenty-two 23 Twenty-three 24 Twenty-four 25 Twenty-five 26 Twenty-six 27 Twenty-seven 28 Twenty-eight 29 Twenty-nine 30 Thirty

Similarly, we can write the number names of the remaining two-digit numbers from 31 to 99.

To write three-digit numbers, we need three digits and three places. We will study the three-digit numbers in your next class.

## Before, After and In Between

Look at the numbers 6, 7 and 8.

1    2    3    4    5    6    7    8    9

6 is just before 7.

7 is in between 6 and 8.

8 is just after 7.

Now, write the numbers that comes before, after and in between the given numbers.

### Tens and Ones

We know that, to write two-digit numbers, we need two places – Ones and Tens.

Let’s write a few numbers in ones and tens columns.

 Numbers Ones Tens 11 1 1 23 2 3 35 3 5 48 4 8

In a two-digit number, the first place from right is ones place and the second place from right is the tens places.

In 11, there are 1 one and one ten. In 23, there are 3 ones and 2 tens. In 35, 5 ones and 3 tens. In 48, there are 8 ones and 4 tens.

## Comparing Numbers

Here, 7 is less than 9. It can be written as 7 < 9.

And, 9 is greater than 7. It can be written as 9 > 7.

<” is called less than symbol and “>” is called greater than symbol.

If two numbers are equal, then we write it as 8 = 8. “=” is equal to symbol.

## Smallest Number / Greatest Number

In the three numbers given in the circles above, 18 is the smallest number.

In the three numbers given in the circles above, 82 is the greatest number.

## Ordering Numbers

We can arrange the given numbers in two different orders. One is from the smallest to the greatest and the other is from the greatest to the smallest.

### Smallest to Greatest

When the numbers are arranged from the smallest to the greatest, this is called increasing order of ascending order of numbers.

Example 1: Arrange the following numbers in ascending order.

Solution: The numbers in ascending order are as follows:

Greatest to Smallest

When the numbers are arranged from the greatest to the smallest, this is called decreasing order of descending order of numbers.

Example 1: Arrange the following numbers in descending order.

Solution: The numbers in descending order are as follows:

Now, check your understanding of numbers using the following online test.

Class 1 Numbers Test

Class 1 Numbers Worksheet

Please do not enter any spam link in the comment box.