Addition and Subtraction
Category : 3rd Class
Addition and Subtraction
Concept of Zero:
Example: 243 + 0 = 243
Addition:
Addition of 3-digit numbers without carrying:
Example: Add 376 and 213
Solution:
Step- 1: Arrange the numbers according to their proper place values.
Step-2: Add the ONES first, then the TENs and finally the HUNDREDS.
Example: Add 498 and 376
Solution:
Step-1: Arrange the digits of the numerals in proper places.
8+6=14
14 ones = 1 ten + 4 ones
1 ten is carried to tens column. 4 is written in ones place.
Step - 3: Add tens
1 + 9 + 7 = 17
17 tens = I hundred + 7 tens
1 hundred is carried to hundreds column.
7 is written in tens place.
Step - 4: Add Hundreds
1+4+3=8
8 is written in Hundreds place.
Subtraction:
Subtraction of3-digitnumbers without borrowing:
Ex: Subtract 652 from 956
Step - 1: Arrange the numbers according to their proper place values.
Step-2: Subtract ONES first, then the TENS and finally the HUNDREDS.
Ex : Subtract 652 from 831.
Step-1: Arrange the numbers according to their proper place values.
Step - 2: Subtract ONES
1 – 2 = ?
We can't subtract 2 from 1.
3 tens become 2 tens.
Subtract, 11 - 2 = 9
Borrow 1 ten from 3 tens.
1 one become 10 + 1 = 11 ones
Write 9 in ones place
Step - 3: Subtract TENS
We can't subtract "5 from 2.
8 hundreds become 7 hundreds.
Borrow 1 hundred
2 tens become 10 + 2 = 12 tens.
from 8 hundreds.
Subtract, 12 - 5 = 7 Write 7 in tens place
7-6=1
So we write 1 in place of hundreds.
Thus we get 831 - 652 =
You need to login to perform this action.
You will be redirected in
3 sec