91Ó°ÊÓ

Add or subtract. $$ 38.6+13.67 $$

Multiply. $$ -4 \cdot 8 $$

Multiply. $$ 9(-7) $$

Multiply. $$ 13(-5) $$

Divide. $$ -24 \div 6 $$

Simplify each expression. $$ -4(-6)(3) $$

Evaluate each expression. \(7 m-4 n-2\) when \(m=-4\) and \(n=-9\)

Solve. On January \(21,\) the high temperature in Palm Springs, California, was \(89^{\circ}\), and the high temperature in Whitefield, New Hampshire was \(-31^{\circ}\). What was the difference between the temperature in Palm Springs and the temperature in Whitefield?

Simplify. $$ -\frac{108}{63} $$

Multiply. $$ 5 \cdot \frac{8}{3} $$