Most of you are familiar with the idea of carrying in addition. In actual practice, you mentally

carry a number into the next column. This example will show you why you carry.

Add the numbers:

239

The sum of the units column is

26

542

The sum of the tens column is

130

819

The sum of the hundreds column is

1800

356

1956

?

When you find the sum of the units column to be 26, you write the 6 in the units column, but

you have 2 tens also. So you must carry the 2 tens to the second, or tone, column.

The sum of the tens column is 1 hundred and 3 tens. So you write the 3 tens in the

column

and carry the 1 hundred to the

column.

The sum of the hundreds column is 1 thousand and

hundreds. So you write the

in the hundreds column and carry the

thousands to the

column.

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