Basic Math Examples

$2 + - 4$

Step 1

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

$1 \cdot - 1 = - 1$

$2 - 4$

Step 2

Subtract

$4$ from

$2$ .

$- 2$