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# Class 1 Number System

Place Value

Before After and Between

Comparing Numbers

Number Names

Smallest Number / Biggest Number

Order of Numbers

Number System Test

Number System Worksheet

## Place Value

We have single digit, two digits, three digits, etc. numbers. For single digit numbers (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) we use only one place to write. This place is known as Ones Place.

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

We need two places to write two-digit numbers. 10, 11, 12, etc. are some examples of two-digit numbers. Let s consider 12 as two-digit numbers. In this case 2 is in the Ones Place, and 1 is in the Tens Place.

Number Name Tens Ones
Ten 1 0
Eleven 1 1
Twelve 1 2
Thirteen 1 3
Fourteen 1 4
Fifteen 1 5
Sixteen 1 6
Seventeen 1 7
Eighteen 1 8
Nineteen 1 9
Twenty 2 0

Similarly, we need three places for three-digit numbers. 100, 101, 102, 103, etc. are examples of three-digit numbers. Let s consider 103 as three-digit numbers. Here, 3 is in the Ones Place, 0 is in Tens Place and 1 is in Hundred Place.

Number Name Hundreds Tens Ones
One hundred 1 0 0
One hundred one 1 0 1
One hundred two 1 0 2
One hundred three 1 0 3
One hundred four 1 0 4
One hundred five 1 0 5
One hundred six 1 0 6
One hundred seven 1 0 7
One hundred eight 1 0 8
One nundred nine 1 0 9
One hundred ten 1 1 0

## Number Names

Number Number Name Number Number Name Number Number Name
21 Twenty one 31 Thirty one 41 Forty one
22 Twenty two 32 Thirty two 42 Forty two
23 Twenty three 33 Thirty three 43 Forty three
24 Twenty four 34 Thirty four 44 Forty four
25 Twenty five 35 Thirty five 45 Forty five
26 Twenty six 36 Thirty six 46 Forty six
27 Twenty seven 37 Thirty seven 47 Forty seven
28 Twenty eight 38 Thirty eight 48 Forty eight
29 Twenty nine 39 Thirty nine 49 Forty nine
30 Thirty 40 Forty 50 Fifty

## Smallest Number / Biggest Number

15 is the smallest number from the above given three numbers.

50 is the greatest number from the above given three numbers.

## Order of Numbers

We can arrange the numbers in two ways, one is from smallest to biggest and the other one is from biggest to smallest.

### Smallest to Biggest

When you write a group of numbers from smallest to biggest it is called ascending order.

Example 1.Arrange the below given numbers in smallest to biggest order.

Solution.

### Biggest to Smallest

When you write a group of numbers from biggest to smallest it is called descending order.

Example 1. Arrange the below given numbers in biggest to smallest order.

Solution.

## Class-1 Number System Test

Place Value & Face Value Test - 1

Place Value & Face Value Test - 2

Number System Test - 1

Number System Test - 2

Number System Test - 3

## Class-1 Number System Worksheet

Place Value Worksheet - 1

Place Value Worksheet - 2

Number System Worksheet - 1

Number System Worksheet - 2

Number System Worksheet - 3

Number System Worksheet - 4

Number System Worksheet - 5