Type numbers and labels straight into the cells. Start a cell with = for a formula — e.g. =B2*C2, =SUM(B2:B10). On a laptop, use the arrow keys to move between cells (Enter goes down, Tab goes right). Hold Shift with arrows or clicks to select a range; Ctrl+C/X/V copies, cuts and pastes (formulas adjust), Ctrl+Z undoes, Ctrl+B/I/U formats, Delete clears, Ctrl+D/R fills down/right, Ctrl+arrows jump to data edges. Drag with the mouse to select, drag the orange corner square to fill, click headers to select rows/columns, right-click for more — and the toolbar merges cells. Your work auto-saves on this device.

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Type your key figures below — they are checked instantly. Then tick off each marking point you earned against the model answer. This is a study guide, not an examiner: be honest with yourself.