91Ó°ÊÓ

Simplify. $$ |17-8|-|13-4| $$

Simplify each expression. $$ 48+(-16) $$

Simplify each expression. $$ 34+(-19) $$

Simplify. $$ 8-2 $$

Simplify. $$ 8-(-4) $$

Simplify. $$ \text { (a) } 27-(-18) \text { (b) } 27+18 $$

Simplify each expression. $$ 48-87 $$

Simplify each expression. $$ 32-[5-(15-20)] $$

The highest elevation in the United States is Mount McKinley, Alaska, at 20,320 feet above sea level. The lowest elevation is Death Valley, California, at 282 feet below sea level. Use integers to write the elevation of: ? Mount McKinley. ? Death Valley

The highest recorded temperature on Earth was 58° Celsius, recorded in the Sahara Desert in 1922. The lowest recorded temperature was 90° below 0° Celsius, recorded in Antarctica in 1983. Use integers to write the: ? highest recorded temperature. ? lowest recorded temperature.