Quick Ways of Subtracting
3rd Maths | Term 3 Unit 7: Information Processing
We shall learn some tricks in subtraction also.
1. Using the Subtraction Table
We shall use the subtraction table to subtract small numbers.
2. Some Facts in Subtraction
Subtracting 0 from a number
A number remains the same when you subtract 0 from it.
Subtracting 1 from a number
When 1 is subtracted from a number, it gives a number before that number.
Subtracting 2 from a number
When 2 is Subtracted from a number, the numbers moves backward 2 steps.
Subtracting 10 from a number
When 10 is Subtracted from a number its ones place remains the same and digit in 10 place is decreased by 1 i.e., moves to the previous number.
3. Subtracting Same Numbers
Subtracting a number from itself will give the difference 0.
Example
Find the difference of 978−978 = 0
4. Subtracting Numbers Ending with 0
Subtract 1 from both numbers and then do the actual subtraction.
Example 1
Find the difference of 340 − 229
Example 2
Find the difference of 1000−574
As we subtract 1 from both the numbers the answer of the new numbers and question are same.
Practice Problems
Subtract the given numbers using the above facts.
