## Addition

When adding numbers, each of the numbers being added together are referred to as addends while the result is called the sum.

312 (addend)

51 (addend)

+ 32 (addend)

395 (sum)

When adding numbers, it is best to write the numbers with the units of the numbers are aligned vertically before performing the addition:

2223

344

+ 12

2579

When adding numbers representing amounts of money, each amount should be written as a dollar amount with two places to the right of each decimal point. Thereafter, the entries should be aligned at the decimal points and added with the dollar signs included:

Example:

$5.22 + $1.02 + 15¢ =?

Writing 15¢ as $0.15, we can add as follows:

$5.22

$1.02

+$0.15

$6.39

Solution:

Writing 15¢ as $0.15, we can add as follows:

$5.22

$1.02

+$0.15

$6.39