Work through the levels in order. Type your answer and press Check — open the worked solution if you get stuck. Answers like -6, 3/4 or 0.25 are typed exactly as shown. A ⭐ Bonus Challenge at the end is extra credit — skip it if the rest was hard work.
Level 1 · Warm-up
1 An item costs $6.40 and you pay with a $10 note. What is your change?
Show worked solution
$6.40 + 60c = $7, then $7 + $3 = $10. Change is 60c + $3 = $3.60.
2 An item costs 75c and you pay $1. What is your change in cents?
Show worked solution
100 − 75 = 25c.
3 An item costs $12 and you pay with a $20 note. What is your change?
Show worked solution
$20 − $12 = $8.
Level 2 · Core
4 Two items cost $3.60 and $2.15. You pay with a $10 note. What is your change?
Show worked solution
Total: $3.60 + $2.15 = $5.75. Change: $10 − $5.75 = $4.25.
5 You get $4.35 change from a $20 note. How much did the item cost?
Show worked solution
$20 − $4.35 = $15.65. (Check: $15.65 + $4.35 = $20.)
6 An item costs $7.80 and you pay with a $10 note. What is the FEWEST number of coins your change could be?
Show worked solution
Change is $2.20, which is a $2 coin and a 20c coin: 2 coins.
Level 3 · Challenge
7 You buy 3 items costing $2.50 each and pay with a $10 note. What is your change?
Show worked solution
Three items: 3 × $2.50 = $7.50. Change: $10 − $7.50 = $2.50.
8 After buying a book for $4.60 you have $5.40 left. How much money did you start with?
Show worked solution
$4.60 + $5.40 = $10.
9 You pay for a $6.75 item with a $10 note and get your change in the fewest coins possible. How many coins is that?
Show worked solution
Change is $3.25. Biggest first: $2 + $1 + 20c + 5c = 4 coins.
⭐ Bonus Challenge · only if the rest felt easy
10 You buy a $4.35 book and a $2.80 pen and pay with a $10 note. Your change comes in the FEWEST coins and notes possible. How many coins and notes is that?
Show worked solution
Total: $4.35 + $2.80 = $7.15. Change: $10 − $7.15 = $2.85. Biggest first: $2 + 50c + 20c + 10c + 5c = 5 coins.