Evaluate 10+-2

$10 + - 2$

Replace all occurrences of $+$ $-$ with a single $-$ . A plus sign followed by a minus sign has the same mathematical meaning as a single minus sign because $1 \cdot - 1 = - 1$

$10 - 2$

Subtract using long subtraction.

Set up the subtraction problem in long subtraction format.


	$1$	$0$
$-$		$2$

Borrow $10$ from the digit in the next column to the left. Add the borrowed $10$ to $0$ . Reduce the number that was borrowed from by $1$ .

	$0$	$10$
	$1$	$0$
$-$		$2$

Subtract $2$ from $10$ .

	$0$	$10$
	$1$	$0$
$-$		$2$
		$8$

Subtract $0$ from $0$ .

	$0$	$10$
	$1$	$0$
$-$		$2$
	$0$	$8$

	$0$	$10$
	$1$	$0$
$-$		$2$
	$0$	$8$

The result of $10 - 2$ is $8$ .

$8$

Evaluate 10+-2

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