Solving Mathematical and Real-World Problems Involving All Forms of Rational Numbers

You are on a roller coaster that begins 1/5 mile above ground. The roller coaster descends 1/2 mile. What is the roller coaster's new location after descending?

Which expression could you use to solve this problem?

• 1/5 + 1/2

• 1/5 - - 1/2

• 1/5 - 1/2

• 1/5 * 1/2

You are on a roller coaster that begins 1/5 mile above ground. The roller coaster descends 1/2 mile. What is the roller coaster's new location after descending?

What is the answer?

• -3/10 miles

• 7/10 miles

• -1/2 miles

• 1/10 miles

Determine the distance in altitude between New Orleans, Louisiana (8.2 feet below sea level) and Rapid City, South Dakota (32.9 feet above sea level).

Which expression could you use to solve the problem?

• -8.2 + 32.9

• 8.2 / 32.9

• 32.9 - - 8.2

• -8.2 * 32.9

Determine the distance in altitude between New Orleans, Louisiana (8.2 feet below sea level) and Rapid City, South Dakota (32.9 feet above sea level).

What is the answer?

• 24.7 feet

• 41.1 feet

• 268.96 feet

• 4.01 feet

A computer stock lost 1/2 point every 6 hours. Find the total points the stock fell.

Which expression could you use to find the answer?

• 1/2 * 6

• -1/2 * 6

• -1/2 + 6

• 1/2 + 6

A computer stock lost 1/2 point every 6 hours. Find the total points the stock fell.

What is the answer?

• 3 points

• 6 1/2 points

• - 6 1/2 points

• -3 points

Cody decreased the speed of his car by 3.5 miles per second over a period of 70 seconds. Find the average change in speed for 1 second.

Which expression could you use to get the answer?

• 70 * 3.5

• 70 * - 3.5

• -3.5 / 70

• 70 / -3.5

Cody decreased the speed of his car by 3.5 miles per second over a period of 70 seconds. Find the average change in speed for 1 second.

What is the answer?

• -0.05

• 0.05

• 20

• -20