Count up
Start at the price and count toward the amount paid.
Change-Making Market
Build exact change using quarters, dimes, nickels and pennies.
Grades 2–5 · Math
Your goal
The price is $0.65 and the customer paid $1.00. Build the exact change with coins.
Reduced motion is on. The controls still update the scene.
Price $0.65 + change $0.00 = $0.65. Add $0.35 more change.
25 cent coins · 0 selected
10 cent coins · 0 selected
5 cent coins · 0 selected
1 cent coins · 0 selected
This market uses US coin values of 25, 10, 5 and 1 cents with no tax. Each illustrated stack represents a denomination; the printed count gives its exact size. Any exact combination works.
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Learn with Change-Making Market
Change-Making Market lets elementary students build change one coin at a time. A receipt states the price and the amount paid, while a running equation combines the price with the selected coins. Add or return quarters, dimes, nickels, and pennies to make the two sides agree. Nine transactions increase the amount of change and encourage learners to compare different valid combinations. The feedback reports how much more change is needed or how much should be returned, supporting both counting up from a price and subtraction with money.
What to look for
Trade equal values
Two nickels have the same value as one dime.
Check the equation
Price plus change should equal the amount paid.
For teachers and curious learners
Connect price plus change with the amount paid. Ask students to predict what will happen, change one setting, and explain what they observe. Learn gives a starting point. Practice and Challenge offer new goals with the same scene.
US coin values are modeled as integer cents with no tax. Coin counts are limited to 300 per denomination, and selected change cannot exceed the amount paid. Illustrated stacks are symbolic; printed counts are exact.