# Chapter 2 - Section 2.4 - An Introduction to Problem Solving - Exercise Set: 78

Example answer: I wanted to buy an iPhone at full price, \$850. I had \$650. I did the math to see how much more money I needed. 850-650=200. So I realized I needed 200 more dollars.

#### Work Step by Step

Think of any time you used math to solve a real world problem. Remember when you wanted to buy the new toy or gadget but didn't have enough money and had to figure out how much more you needed? That's using math for real world situations.

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