From the course: Teaching Future-Ready Students
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The tip calculator
- In this video I'm going to demonstrate how to teach variables with Math by assigning students to create a tip calculator using a spreadsheet, and simple formulas. Anyone can use simple Algebra to calculate a tip, using the following formula. Let's create a variable, T, that stands for the tip. We'll create B that's going to stand for the bill. And R will stand for the tip rate that we choose to tip our waiter. The mathematical formula that calculates the tip based upon the bill and the rate, is as follows. T equals B times R divided by 100. We need to divide it by 100 because the rate is actually a percentage. Many basic Algebra lessons will cover similar material. However, when we build this into a programming lesson, the variables become dynamic. And seeing the numbers change in real time provides students the satisfaction of actually building a useful tool with Math and programming concepts. The simplest way to build a tip calculator is to use a spreadsheet. Excel certainly…
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