Which expression is represented on the number line below? A. -4 + 3 B. -4 – 3 C. -4 + 7 D. -4 – 7

## Make Zero

A. Describe a situation in which opposite values combine to make zero. B. Graph the equation representing the situation from part A on a number line.

## Maya is Selling Bottled Water

Maya bought 72 bottles of water to sell at the concession stand for the weekend. By Sunday morning, she sold 63 bottles of water. A. Represent the situation as the addition of integers, and solve the problem to determine how

## Ronnie’s Science Experiment

During a science experiment, Ronnie raises the temperature of his solution by 25 degrees. Overnight, the temperature of his solution falls 20 degrees. Which of the following explains what Ronnie can do to make the net change of the temperature

## Making Zero

Which situation below will result in zero when the quantities are combined? A. Sangi has $45 in his savings account and withdraws $42. B. After riding his dirt bike, the tires lost 4 psi of air, and Derek pumps 4

## Alexis is Subtracting on a Number Line

Alexis wants to represent the subtraction problem below on a number line. 45 – 8 If she does not decompose the numbers, describe two ways Alexis can represent this problem on a number line, and compare this to the number

## Find Alec’s Mistake

Alec used a number line to solve (-8) – (-7). A. Explain the mistake on Alec’s number line. B. Draw a number line that correctly shows (-8) – (-7), and write the solution.

## Find Yanni’s Mistake

Yanni used a number line to solve (-13) + (-9). A. Explain the mistake on Yanni’s number line. B. Draw a number line that correctly shows (-13) + (-9), and write the solution.

## Tierra is Adding on a Number Line

Tierra wants to represent the addition problem below on a number line. 12 + 20 She wants to draw an arrow starting from 12. Her friend says that the arrow should start from 20. Use two number lines to determine

## Trista’s Negative Numbers

Trista says that the difference between two negative numbers is always a positive number. She provides the reasoning below. Since -4 – (-9) = + 5 and -2 – (-3) = + 1, it can be said that the difference between