The row everyone skips
Most typing courses teach the alphabet thoroughly and the number row barely at all. The result is that even fast typists look down for digits, which breaks rhythm badly in any work involving figures — invoices, data entry, spreadsheets, code with numeric literals.
Finding the numbers without looking
Each finger owns the digit directly above its home key: index fingers cover 4, 5, 6 and 7, and the reach extends outward from there. Practising until the reach is automatic — rather than a glance-and-hunt — is what separates comfortable numeric typing from constant interruption.