Numbers 10 to 20
In this section you will learn numbers 10 to 20.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. How many chocolates do you have?
9 + 1 = 10
You will have total 10 chocolates. This is a two digit number.
Note: When you add smallest one digit and largest one digit you will get smallest 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.
1 Ten and 2 ones = 12(Number name:
Twelve)
10 + 2 = 12
For number 15
1 Ten and 5 ones = 15 (Fifteen)
10 + 5 = 15
For number 17
1 Ten and 7 ones = 17
10 + 7 = 17
Number Names
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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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