8/21 Adding and Subtracting Rational Numbers

Multiple Choice

Which of the following statements best describes how positive and negative numbers control the robot in the Robotics Club?

• Positive numbers move the robot forward, negative numbers move it backward.

• Negative numbers move the robot forward, positive numbers move it backward.

• Both positive and negative numbers move the robot forward.

• Only positive numbers control the robot's movement.

Multiple Choice

What is the sum of the numbers 3, 6, -20, 5, and -12?

• -18

• -8

• -10

• -16

Open Ended

Will the sequence of numbers 2.5, 1.5, and 4.25 entered when the robot is at -8.75 get the robot back to zero? How do you know?

Multiple Choice

What is the result of evaluating -12.4 - (-5.7)?

• -6.7

• -18.1

• -7.7

• 6.7

Multiple Choice

Which of the following expressions is equivalent to -12.4 - (-5.7)?

• -12.4 + 5.7

• -12.4 - 5.7

• 12.4 + 5.7

• -12.4 + (-5.7)

Open Ended

Evaluate the expression: $$10\ \frac{1}{3\ }+\ \left(-5\ \frac{1}{9}\right)$$

Multiple Choice

What was the overall profit or loss for the first four months the coffee shop was open?

• -$1,135.80

• + $3,298.63

• + $3,216.13

• -$4,507.06

Open Ended

Luke opened a savings account and deposited $20 in it. Over the next two weeks, he made two additional deposits of $15 and $35. At the end of the month, he made a withdrawal that brought his balance down to $0. How much money did Luke withdraw at the end of the month?

Multiple Choice

Issac, Bryan, and Alyssa gather pecans to shell for their mother. Isaac gathers $$4\frac{3}{8}$$ pounds, Bryan gathers 3.25 pounds, and Alyssa gathers $$2\ \frac{1}{2}$$ pounds. If they all place their pecans in the same bucket, how many pounds of pecans are in the bucket?

• 9 1/8 pounds

• 9 5/8 pounds

• 10 1/4 pounds

• 10 1/8 pounds