Work out making change practice instantly with clear inputs, formula shown and shareable results.
Change is the amount handed over minus the amount due, then broken into the fewest pieces by taking the largest denomination that fits at each step. The greedy largest-first method is exactly what a shop assistant does, and it teaches place value far better than counting up in ones.
Change due
change = amount handed over - amount to pay
Fewest pieces
Repeatedly take the largest denomination not exceeding the remaining change
change = amount handed over - amount to pay. Change is the amount handed over minus the amount due, then broken into the fewest pieces by taking the largest denomination that fits at each step.
The greedy largest-first method is exactly what a shop assistant does, and it teaches place value far better than counting up in ones.
Enter amount to pay, amount handed over. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.