Up till now you have studied numbers from 0(zero) to 9. Now the next numbers which are 10 to 20. we have studied single digit numbers, now two digit numbers.

For example, if you have 9 chocolates and I have given you 1 more chocolates.

9 + 1 = 10

You will have total 10 chocolates. This is a two digit number.

Number 9 is the largest single digit number and number 10 is the smallest two digit number.

As there are two digits, one digit at ones (units) place and the other digit at tens place. In this way the two digit number is formed.

For example : In 12 , first number from left is 2 and right is 1.

1 is at tens place and 2 is at ones place.

The value of 1 tens is (1 x 10 = 10)

The value of 2 ones is ( 1 x 2 = 2)

So the number formed is 12.

Twelve)

10 + 2 = 12

For number 15

10 + 5 = 15

For number 17

10 + 7 = 17

Sr. |
Numbers |
Number Names |

1) |
10 |
Ten |

2) |
11 |
Eleven |

3) |
12 |
Twelve |

4) |
13 |
Thirteen |

5) |
14 |
Fourteen |

6) |
15 |
Fifteen |

7) |
16 |
Sixteen |

8) |
17 |
Seventeen |

9) |
18 |
Eighteen |

10 |
19 |
Nineteen |

11 |
20 |
Twenty |

_________________________________________________________________

Q.1 Write the number names of the following :

1) 12

2) 16

3) 10

4) 18

5) 19

Q.2 Write the numbers

1) Fourteen :

2) Eleven :

3) Fifteen :

4) Seventeen :

5) Twenty :

Q.3 Write the missing numbers :

1) 10, ____,12

2) 15,____,17

3) ____, 12,13

4) 16,17,____

5) 19,_____,21

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