ITMC 2018 Grade 3 National Preliminary set01 Question 1

Exam instructions: National Preliminary; 90 minutes (catalogue rule). Printed marking: Q1–12: correct 4 / blank 1 / incorrect 0; Q13–24: correct 6 / blank 1.5 / incorrect 0; Q25–29: correct 7 / blank 0 / incorrect 0; optional Q30: correct 20 / blank 0 / incorrect −7. Printed positive marks are preserved per question. The source uses different blank-answer and incorrect-answer rules by section, including an optional bonus penalty; the import does not reproduce that complete official scoring scheme.

Which subtraction has a difference of 563?