Simplify \displaystyle \frac{-4}{-5} .

Simplify and evaluate \displaystyle -3^2 -(-1)^2

A piece of wood trim is 51\frac{3}{8} in. long. A piece 31 \frac{5}{6} in. long is cut from it. How long is the remaining piece of wood if the cut removes \frac{1}{8} in. of wood?

Calculate.

\displaystyle (\frac{-4}{7}) - (-2 \frac{1}{2})

Calculate.

\displaystyle -2 \frac{2}{3} \div \frac{3}{4}

The high temperatures for a city during a five—day period were 4.5 °C, 2.3 0C, —3.2 °C, —11.7 °C, and -9.8 °C. Determine the average temperature during the five—day period.

Evaluate \displaystyle [- \frac{2}{3}( 1 \frac{4}{5})]^2+2(-1\frac{1}{2})^3