Kumon My Book of Simple Subtraction: Revised Edition helps children build a strong foundation in subtraction through clear, step-by-step practice aligned with Ontario elementary mathematics expectations. Using the proven Kumon progression, this workbook supports confidence, independence, and strong early number sense.

The book begins by reviewing numbers and counting to strengthen foundational skills before introducing subtraction. Children then gradually shift to subtracting the numbers one through five, starting very simply and progressing at a comfortable pace. The workbook focuses on building concept first, then fluency, helping children understand subtraction as “taking away” before developing speed and accuracy.

Through repetition and carefully sequenced progression, children learn to subtract 1–5 from numbers up to 20, building subtraction understanding step-by-step from foundational number skills.