Chemistry Examples

$1278 + 142.67$

Step 1

Add using long addition.

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Step 1.1

Set up the addition in long addition format, placing the larger number on top of the smaller number. Align the decimal points in each addend.


	$1$	$2$	$7$	$8$
$+$		$1$	$4$	$2$	.	$6$	$7$
					.

Step 1.2

Add the numbers together from the far right column.


	$1$	$2$	$7$	$8$
$+$		$1$	$4$	$2$	.	$6$	$7$
					.		$7$

Step 1.3

Add the numbers together from the next column to the left.


	$1$	$2$	$7$	$8$
$+$		$1$	$4$	$2$	.	$6$	$7$
					.	$6$	$7$

Step 1.4

Add the numbers together from the next column to the left. Since the result is greater than $10$ , carry the tens digit to the next column.

			$1$
	$1$	$2$	$7$	$8$
$+$		$1$	$4$	$2$	.	$6$	$7$
				$0$	.	$6$	$7$

Step 1.5

Add the numbers together from the next column to the left, including the carry digit. Since the result is greater than $10$ , carry the tens digit to the next column.

		$1$	$1$
	$1$	$2$	$7$	$8$
$+$		$1$	$4$	$2$	.	$6$	$7$
			$2$	$0$	.	$6$	$7$

Step 1.6

Add the numbers together from the next column to the left, including the carry digit.

		$1$	$1$
	$1$	$2$	$7$	$8$
$+$		$1$	$4$	$2$	.	$6$	$7$
		$4$	$2$	$0$	.	$6$	$7$

Step 1.7

Add the numbers together from the next column to the left.

		$1$	$1$
	$1$	$2$	$7$	$8$
$+$		$1$	$4$	$2$	.	$6$	$7$
	$1$	$4$	$2$	$0$	.	$6$	$7$

		$1$	$1$
	$1$	$2$	$7$	$8$
$+$		$1$	$4$	$2$	.	$6$	$7$
	$1$	$4$	$2$	$0$	.	$6$	$7$

Step 2

The sum of $1278$ and $142.67$ is $1420.67$ .

$1420.67$