Adding decimals

To add decimals, align the numbers by their decimal points and add each column starting from the right, carrying over if necessary.

You align decimals by writing the numbers one above the other so that the decimal points are in the same vertical line.

The sum of 6.7 and 0.9 is 7.6.

The sum of 7.87 and 3.6 is 11.47.

To add a whole number to a decimal, you can write the whole number as a decimal (e.g., 4 as 4.0) and then align the decimal points before adding.

The sum of 31.5 and 6.24 is 37.74.

The sum of 0.61 and 0.7 is 1.31.

Carrying over is important in decimal addition to ensure that the value of the sum is accurate when the sum of a column exceeds 9.

The sum of 4.7 and 1.8 is 6.5.

If the numbers have different decimal places, you can add zeros to the end of the shorter number to make them the same length before adding.