The four basic mathematical operations are: Adding two (or more)
numbers means to find their sum (or total). The symbol used for
addition is '+'. For example, 5 + 10 = 15 This is read as five
plus ten is equal to fifteen or simply, five plus ten is
fifteen. Find the sum of 9 and 8. 9 + 8 = 17 Addition of Large
Numbers To add large numbers, list them in columns and then add
only those digits that have the same place value. Find the sum
of 5897, 78, 726 and 8569. - Write the numbers in columns with
the thousands, hundreds, tens and units - 7 + 8 + 6 + 9 = 30.
Thus, the sum of the digits in the units column is 30. So, we
place 0 in the units place and carry 3 to the tens place. - The
sum of the digits in the tens column after adding 3 is 27. So,
we place 7 in the tens place and carry 2 to the hundreds place.
- The sum of the digits in the hundreds column after adding 2 is
22. So, we place 2 in the hundreds place and carry 2 to the
Subtracting one number from another number is to find the
difference between them.