Evaluate 0.099999+12.5

$0.099999 + 12.5$

Step 1

Add using long addition.

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.


	$1$	$2$	.	$5$
$+$		$0$	.	$0$	$9$	$9$	$9$	$9$	$9$
			.

Add the numbers together from the far right column.


	$1$	$2$	.	$5$
$+$		$0$	.	$0$	$9$	$9$	$9$	$9$	$9$
			.						$9$

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


	$1$	$2$	.	$5$
$+$		$0$	.	$0$	$9$	$9$	$9$	$9$	$9$
			.					$9$	$9$

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


	$1$	$2$	.	$5$
$+$		$0$	.	$0$	$9$	$9$	$9$	$9$	$9$
			.				$9$	$9$	$9$

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


	$1$	$2$	.	$5$
$+$		$0$	.	$0$	$9$	$9$	$9$	$9$	$9$
			.			$9$	$9$	$9$	$9$

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


	$1$	$2$	.	$5$
$+$		$0$	.	$0$	$9$	$9$	$9$	$9$	$9$
			.		$9$	$9$	$9$	$9$	$9$

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


	$1$	$2$	.	$5$
$+$		$0$	.	$0$	$9$	$9$	$9$	$9$	$9$
			.	$5$	$9$	$9$	$9$	$9$	$9$

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


	$1$	$2$	.	$5$
$+$		$0$	.	$0$	$9$	$9$	$9$	$9$	$9$
		$2$	.	$5$	$9$	$9$	$9$	$9$	$9$

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


	$1$	$2$	.	$5$
$+$		$0$	.	$0$	$9$	$9$	$9$	$9$	$9$
	$1$	$2$	.	$5$	$9$	$9$	$9$	$9$	$9$


	$1$	$2$	.	$5$
$+$		$0$	.	$0$	$9$	$9$	$9$	$9$	$9$
	$1$	$2$	.	$5$	$9$	$9$	$9$	$9$	$9$

Step 2

The sum of $12.5$ and $0.099999$ is $12.599999$ .

$12.599999$

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