Operations with Negative Numbers Addition and Subtraction

It's getting really cold in Srinagar today. The temperature is dropping by 2° every hour. It is 6° celsius right now. How long will it take for the temperature to hit −10° celsius? (in hours)

On math test, correct answers would be awarded 5 points, incorrect answers would be awarded -2 points, and no answers would be awarded -1 points. Out of 12 questions, Rara answered 7 questions correctly, 3 questions incorrectly, and she did not answer the remaining. What was the total points Rara got from the test?

Joe is playing a game with a regular die. If the number that turns up is even, he will gain 5 times the number that comes up. If it is odd, he will lose 8 times the number that comes up. He tosses a 3 and a 6. Express the total points Joe gains as an operation of integers.

• 6 x 5 + 3 x (-8)

• 6 x (-8) + 3 x 5

• 6 x 5 - 3 x (-8)

• 6 x 8 - 3 x 5

(-43) + (-44)

• -87

• 87

• 1

• -1

(-8) + (-23) =

• -31

• 31

• 15

• -15

Solve the problem.
-2 + (-5)

• 7

• -7

• -3

• 3

What operation should you use when you need to find the difference?

• Addition

• Subtraction

• Multiplication

• Division

The phrase "decreased by" best associates with...

• Addition

• Subtraction

• Multiplication

• Division

The phrase "how many more" best associates with...

• Addition

• Subtraction

• Multiplication

• Division

Which numerical expression best represents the problem below:

"8 fewer than 20"