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

Answer

Question 4

Use the number line interactive tool to determine the predicted temperature in May. What is Ken’s temperature prediction for May?14ºC✔ 8ºC 6ºC–14ºC

Revolt · Accepted Answer

✔ 8ºC

Question 5

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.

Question 6

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

Answer

Question 7

[6 + 3] + 5 = 14(–5) + [3 + 6] = –4[(–5) + (–3)] + 6 = –25 + [(–6) + (–3)] = –4[6 + (–5)] + (–3) = –2[(–5) + 6 ] + (–3) = 4

Revolt · Accepted Answer

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

Question 8

The actual low temperature in December was ºC.

Revolt · Accepted Answer

-2

Question 9

What property did Bill use?associative property✔ commutative propertydistributive propertyidentity property

Revolt · Accepted Answer

✔ commutative property

Question 10

What is the error in Aaron’s reasoning?

Revolt · Accepted Answer

The negative signs were switched.

Adding Integers Answers

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