Embedded Files
CONTENTS OF THIS PAGE:
Before numbers
After numbers
How to get a total of 10?
How to add two digit numbers?
Practice Sheet
What is subtraction?
Subtraction - Practice Sheet
Three digit numbers
BEFORE NUMBERS:
It is the number which comes immediately before a number in the number system. Let us see some examples.
The number preceding a given number is called the before number. The numbers written in red in the box above are the before numbers for the numbers written in blue.
AFTER NUMBERS
The number that comes immediately after a number in the number system is called the after number. In other words, the number which follows a number is called the after number. Let us see some examples.
In the box above, the numbers written in green are the after numbers for the numbers written in red.
Combination of one digit numbers added to get a total of 10
1 + 9 = 9 + 1 = 10
2 + 8 = 8 + 2 = 10
3 + 7 = 7 + 3 = 10
4 + 6 = 6 + 4 = 10
5 + 5 = 10
10 which consists of two digits is the number that follows the greatest one digit number 9.
Two digit number consists of ones and tens.
Two digit numbers start from 10 and end with 99.
10 is the smallest two digit number.
99 is the greatest two digit number.
Addition of two digit numbers
25 + 2 = 27
41 + 10 = 51
45 + 12 = 57
36 + 20 = 56
54 + 44 = 98
In all the above sums, the ones place of the two numbers are added first. On adding, we once again get a single digit number. It is written as the ones place of the result,
Following this, we add the tens place of the two numbers. Here again we get a single digit number and that is written in the tens place of the result.
The result is a two digit number in all the above sums.
PRACTICE SHEET
38 + 9
22 + 32
56 + 20
40 + 42
30+ 30
72 + 18
88 + 9
25 + 60
35 + 45
29 + 19
We shall see three digit numbers in the next section.
Subtraction:
Subtraction means take away a number from a number. The symbol used is '-' which means minus.
9 - 3 means 3 is taken away from 9.
The smaller number is taken away from a larger number.
How to subtract one digit numbers?
9 - 3
\ \ \ \ \ \ \ \ \ = 6
8 - 5
\ \ \ \ \ \ \ \ = 3
Practice Sheet
Subtraction of one digit numbers from one digit numbers.
Find the following:
3 - 1
5 - 2
6 - 1
7 - 4
8 - 3
9 - 5
5 - 4
8 - 2
9 - 2
7 - 6
TO RECALL TOPICS GO TO THE PREVIOUS PAGES BY CLICKING BELOW
Page updated
Google Sites
Report abuse