Take two or three hands-up answers. Listen for a pupil naming the missing zero. Do not confirm the rule yet — hold it for Watch and Notice. If nobody spots it, ask "how many figures do we always write after the point when it is money?"

Open on €7.50 to settle the receipt from Getting Started. Point to the empty one-cent column: the zero is holding the place, not decoration. Say "seven euro, fifty cent — the zero tells us there are no one-cent coins." Keep this a quick read.

Now read €12.50 and €8.75 aloud with the class at a glance — these are the two amounts the sum tray will combine. Do not linger; they run straight into the sum.

On the sum, hold out for the regroup: "fifty and seventy-five make a hundred and twenty-five cent — that is more than a euro." Let the class say where the carried euro goes before you confirm.

On the share, this is the division model the Class Challenge needs. Say "twenty-seven euro among three is nine euro each; sixty cent among three is twenty cent each — so nine euro twenty." The last tray shows one person's share.

Talk this one through together — pupils take turns at the board building on the tray, and the class agrees or corrects out loud. The tray builds each amount or lot; the totalling and counting-up happen on the board, not inside the tray.

€3.05 is the wrinkle-catcher: the zero sits in the ten-cent column, not the one-cent column. Ask a pupil to point to which column is empty before reading it.

On €3.25 × 4, build one lot on the tray first and ask the class how many cent in that one lot (25c). Then ask how many lots we need (4). Turn-and-name a pupil to say four lots of 25c, and revoice: four 25c make 100c, which is €1.00 carried; four €3 make €12, so €13.00 altogether. Building the total step by step keeps the whole class with the multiplication rather than only the pupil at the board.

On the change from €20.00, count up from €13.45 to €20.00 on the board rather than subtracting digit by digit if pupils get stuck.

This is the practice round — pupils take turns at the board, check each answer, and the class confirms before moving on. Keep the board work brisk rather than over-explaining. The three core problems are what the class must complete in the slot; the change-from-€20 problem is an extension only if time allows.

The share of €27.60 rehearses the division we built in Watch and Notice: share the euros, then the cent. The change-from-€20 extension is the ceiling: pupils must first find €4.95 × 3 = €14.85, then €20.00 − €14.85 = €5.15. Push them to keep the trailing zero when they write €20.00 and to line up the points. Every pupil can start on the first problem; the strongest reach the two-step extension.