Adding and Subtracting Negative Numbers

Adding and Subtracting Negative Numbers

Read each question carefully and solve the problems involving addition and subtraction of negative numbers. Show your work where indicated.

1. When you subtract a negative number, it's the same as   a positive number.

2. The sum of a number and its opposite is always  .

3. Moving to the left on a number line represents  .

4. Which expression is equivalent to -5 - (-8)?

5. What is the result of -12 + 7?

6. Calculate: -15 + (-20)

7. Calculate: 8 - (-10)

8. Calculate: -7 - 4

9. The expression 6 + (-9) is equivalent to 6 - 9.

10. When you add two negative numbers, the sum is always positive.

11. Use the number line below to demonstrate the solution to -3 + 5.

12. The temperature in the morning was -4°C. By afternoon, it dropped another 7°C. What is the new temperature?

13. A submarine is at a depth of -250 meters. It then ascends 80 meters. What is its new depth?