Tip, Sales Tax & Interest Practice
Tip, sales tax and interest problems are percent problems from everyday life. These games suit roughly grades 6 to 8 and are free to play with no sign-up and no ads.
Kids practice finding 10 percent and adjusting for a tip, adding tax as a percent of the price, and seeing how interest grows money over time.
3 Tip, Tax & Interest Games
- Tip & Tax TillGrades 5–6Stack 10% and 1% chunks of a bill to build a tip or sales tax and read the new total off the money scale.
- Multiplier ChainGrades 7–8Tap multiplier chips onto a price bar — 20% off then 8% tax is ×0.8 ×1.08 — dial the single percent a chain equals, and chain ÷ chips to walk a final price back to the original.
- Interest IslandGrade 7Dial the rate and the years and watch a principal bar grow one yearly interest block at a time to the target line, extend or cut a price bar by a markup or markdown percent, and set the percent error of an estimate against the actual bar.
Common Questions
What is an easy way to calculate a tip in your head?
Find 10 percent by moving the decimal one place left, then adjust. For a 40 dollar bill, 10 percent is 4 dollars. Double it for 20 percent (8 dollars) or add half of it for 15 percent (6 dollars).
How do you calculate sales tax?
Sales tax is a percent of the price. Multiply the price by the tax rate written as a decimal (8 percent is 0.08) and add the result to the price. Or multiply once by 1.08 to get the total directly.
What is simple interest?
Interest is the money a bank pays you on savings, or that you pay on a loan. Simple interest is principal times rate times time. 100 dollars at 5 percent for 3 years earns 15 dollars. Compound interest then earns interest on the interest as well.
What grade learns about tips, tax and interest?
Percent applications such as tips and tax are standard in grades 6 and 7, and simple interest in grades 7 and 8. Each card shows its grade range.
Are these games free?
Yes. They are free with no ads, no in-app purchases and no sign-up.
More Money Math
Counting Money · Discounts & Percent · Credit Cards & Paychecks · Budgeting & Saving
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