One day as the store cashier
Twelve deals per level. A deal solved first time scores 100, so a level is worth 1200 points.
The store is yours for the day. The price tag says how much something costs; you tap exactly that much out of the drawer and into the cash tray — no more, no less. Tap a chip to add it, tap a chip in the tray to take it back, and the total above the tray updates as you go.
Level 1 is paying: the customer picks something, you charge the tag. Level 2 is change: the customer hands over a $10 or $20 bill, so subtract in your head first and then tap what you owe them.
Twelve deals per level. Solve one first time and it scores 100; solve it after a wrong tray it scores 60. A wrong tray never costs points — the tray shakes and you are told whether it is too much or too little, never by how much.
$3.75: do you put down three $1 bills and three quarters, or four $1 bills and get change?Paying means exact, so the dollars go in $1 bills and the cents go in quarters, dimes, nickels and pennies. Change is the bill minus the tag: $10 − $6.50 = $3.50, so three $1 bills plus two quarters.
US money is counted in dollars and cents, and there are 100 cents in a dollar: 1 dollar = 100 cents. A quarter is 25 cents, a dime 10, a nickel 5 and a penny 1 — so four quarters make a dollar, and a dollar buys a hundred pennies.
The pieces look different too: the penny is copper, while the nickel, dime and quarter are silver, and the dime is the smallest of the four. $1, $5, $10 and $20 are bills. When you pay, it is not just the total that matters — you also have to see which piece is in your hand.
Subtract: bill minus tag. $10 − $3.40 = $6.60.
Count up: climb from the tag to the bill. $3.40 plus 60 cents makes $4.00, and $4.00 plus $6 makes $10, so the change is $6.60. Same answer, and counting up is often easier with real coins in your hand.
Do I lose points for a wrong tray?No. Too much or too little costs nothing; the tray shakes and the hint tells you the direction only. How far off you are is yours to count.
Will the hints give me the answer?No. They get more specific one level at a time, and the last one works through a different price tag so you can copy the method, not the answer.
Is my score uploaded?No. Marking, scoring and the star rating all happen in this browser; reload the page and the round starts fresh. Nothing you tap is sent to a server.