Adding is the process of combining two or more numbers or quantities to find their total or sum. It is one of the basic arithmetic operations and is usually represented by the plus sign (+). For example, if you add 2 and 3, the sum is 5. Adding can be done with whole numbers, decimals, fractions, and even negative numbers. It is an essential skill in everyday life, from calculating a grocery bill to balancing a checkbook.

In mathematics, addition is a commutative operation, which means that the order of the numbers being added does not affect the result. For example, 2 + 3 is the same as 3 + 2, and both equal 5. Addition can also be associative, which means that the grouping of the numbers being added does not affect the result. For example, (2 + 3) + 4 is the same as 2 + (3 + 4), and both equal 9.

To add numbers, you can use various methods such as mental math, using a calculator, or using written methods such as column addition. In column addition, you write the numbers one on top of the other, aligning the digits in each place value column, and then add the digits in each column starting from the rightmost column. If the sum of the digits in a column is greater than 9, you carry over the extra digit to the next column on the left.

Overall, addition is a fundamental operation in mathematics that is used in many different contexts and applications.