Addition and Subtraction Equations Answers

Which equation models the situation?

How many giraffes remained at the Liberia zoo?

Julia, the zookeeper, used the equation 52.5 + x = 75 to find the answer. Which equation is an equivalent equation that can be used to solve the problem?

What are equivalent equations? How do you find them? Write a few sentences describing them.

One of the giraffes, Bernard, is sick. Last week he weighed 2,490 pounds. This week, he weighs 2,312 pounds. If w represents the amount of weight lost, which bar diagram can be used to find the amount of weight Bernard lost?

The equation used to solve the equation is 2312 – w = 24902490 + 2312 = w 2490 + w = 2312✔ 2312 + w = 2490

Bernard typically runs x km/hour. While he was sick, he only ran 41.5 km/hour. What equation represents that the difference in his speeds is 13.5 km/hour?

Which zookeeper is correct? Explain.

Write about the errors made by Kendra.

Which of the following did you include in your answer?

The amount of weight Bernard lost is 188 pounds✔ 178 pounds88 pounds78 pounds.

Which of the following did you include in your answer? Select all that apply.

Sample Response: The numbers are in the wrong places in the diagram. 5.5m should be in the top bar diagram and 4.3 in the bottom. One equation could be 4.3 + d = 5.5. Select all that you included in your response.Values are in the wrong parts of the diagram.5.5 m should be in the top bar.4.3 m should be in bottom bar.The equation is incorrect.