Addition and Subtraction Equations Answers
Which equation models the situation?
How many giraffes remained at the Liberia zoo?
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?
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?
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?
What are equivalent equations? How do you find them? Write a few sentences describing them.
Equivalent equations have the same solution. You can create equivalent equations by performing the same operations on each side of the equation. You can check for equivalence by finding the solution for each equation.
Which zookeeper is correct? Explain.
Both zookeepers are correct because they have equivalent equations. Both of the equations will give a healthy speed of 55 km/hr.
Write about the errors made by Kendra.
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.
The amount of weight Bernard lost is 188 pounds✔ 178 pounds88 pounds78 pounds.
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