# Class 1 Number System

Smallest Number / Biggest Number

## 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 |

## Before After and Between

## Comparing Numbers

## 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

## Class-1 Number System Worksheet

## Answer Sheet

**Answer Sheet**Download the pdf

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