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Adding two (or more) numbers means to find their sum (or
total). The symbol used for addition is '+'.
For example, 4 + 6 = 10
This is read as four plus six is equal to ten or simply, four plus six is
ten.
Example 4
Find the sum of 8 and 7.
Solution:
8 + 7 = 15
Addition of Large Numbers
To add large numbers, list them in columns and then add only those digits
that have the same place value, as illustrated below.
Example 5
Find the sum of 4078, 89, 386 and 9347.
Solution:
Note:
- 8 + 9 + 6 + 7 = 30
- The sum of the digits in the first column is 30. So, we place 0
in the units place and carry 3 to the tens place.
- Similarly, the sum of the digits in the second column is 30. So,
we place 0 in the tens place and carry 3 to the hundreds place.
Setting Out:
Often, we set out the solution as follows.
Key Terms
addition, adding, sum,
total, plus,
carry
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