Explanation: Being able to calculate with negative integers is a valuable skill. Using a number line is helpful and you may want to have one available while you complete these problems. Moving left on a number line indicates adding a negative number.

Examples:

- 2 + _ = 7 You started at - 2 and ended at 7. What did you add? Answer: 9 Easy!

4 + _ = - 4 You started at 4 but ended at - 4. What did you add? Answer: - 8 Easy!

Directions: Use the number line to find the missing number. Strive for understanding the topic, strive for accuracy and then strive to increase your speed. Good luck and enjoy the challenge!