Diagnostic & Mastery Workbook
에듀레코드 EDU RECORD · Concept Series No. 6
Inverse Operations,
Foundations to Mastery
Undoing addition, multiplication, reciprocals, square roots, and function machines — one idea, five faces.
How this works: Every question here is really the same question in disguise — "what operation undoes this one?" Start at Question 1 and move straight through; each section opens easy and climbs to a real challenge by its last few items. Tap an answer to check it instantly — a short explanation appears right below either way. Use Print / Save as PDF (bottom right) for a clean paper copy with a full answer key on the last page.