Numerical Expressions

$15\ \div\ 5$

$15\ +\ 5$

$15\times\ 5$

$15\ \div\ 5$

$20\ -\ 5$

$20\ \times\ 5$

$5\ -\ 20$

$20\ +\ 5$

$13\times3$

$13+3$

$13\div3$

$3\ -13$

$20+8$

$20\div8$

$8+20$

$20-8$

$30-10-5$

$30-\left(\left(10+5\right)\right)$

$\left(30-10\right)+5$

$30\div10-5$

$30+15$

$30-15$

$30\div15$

$30\times15$

$18-10$

$10-18$

$10+7$

$10-7$

$100\div5$

$100+5$

$100\times5$

$5\div100$

$8\ +\left(9-3\right)$

$8+\left(\left(3\times9\right)\right)$

$8+3+9$

$3-9\times8$