Explanation: When doing addition problems that involve positive and negative integers it is helpful to think in terms of money. borrowing or spending money can be represented as a negative number. The answers to the problems in this problem set are between - 11 and 0.
Problem In terms of money..... Answer
- 4 + ___ = - 7 You were $4 in debt and are now $7 in debt. You borrowed how much more? $3, so - 3
___ + 6 = 2 You had debt, earned $6, paid the debt and now have $2. Your debt was? $4, so - 4
15 + ___ = 6 You had $15 and now have $6. You spent how much? $9, so - 9
___ + 5 = - 3 You paid $5 of your debt and still have $3 of debt? Your original debt was? $8, so - 8
Directions: For each problem in this problem set you will complete the addition problem following the above examples. Strive to be able to understand the problem and accomplish them with ease, then strive to increase your speed. Good luck and enjoy the challenge!