Adding Integers

Question 1

Ken’s predicted temperature for September is ºC

Revolt · Accepted Answer

16

Question 2

Check all that you included in your response.

Revolt · Accepted Answer

A drop in temperature is a decrease.; A decrease means to add a negative amount.; A negative number is needed to determine a lower predicted temperature.

Question 3

In the previous problem, Ken predicted a drop in temperature. Explain why a drop in temperature would lead to adding a negative integer.

Revolt · Accepted Answer

A drop in temperature means the temperature will decrease. That decrease is represented by a negative integer, which should be added to the previous temperature.

Question 4

Use the number line interactive tool to determine the predicted temperature in May. What is Ken’s temperature prediction for May?

Revolt · Accepted Answer

8ºC

Question 5

Ken’s predicted temperature for April is 7ºC. His prediction for May is 2ºC higher than April. He used the number line to solve the problem, starting at 0, moving right to 7, and then moving 2 units to the left. Explain Ken’s error.

Revolt · Accepted Answer

Ken’s error was showing a decrease in temperature by moving 2 units left on the number line. He should have moved 2 units right to represent an increase in temperature of 2°C.

Question 6

Question 6

Revolt · Accepted Answer

[(–5) + (–3)] + 6 = –2; [6 + (–5)] + (–3) = –2

Question 7

What property did Bill use?

Revolt · Accepted Answer

commutative property

Question 8

What is the error in Aaron’s reasoning?

Revolt · Accepted Answer

The negative signs were switched.

Question 9

Check all that you included in your response.

Revolt · Accepted Answer

Moving left on the number line means a decrease in temperature.; The temperature increased 2 degrees.; The increase in temperature means addition.; Adding a positive integer means moving to the right on the number line.

Adding Integers Answers

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