Parents use the answer book to mark work daily. Immediate grading allows students to correct errors while the logic is still fresh in their minds, which is essential for the Kumon method.

Similar to addition, subtraction requires learners to compute borrows mentally to find direct vertical solutions.

Would you like tips on how to solve typical Level B problems without the answer key, or how to request help from a Kumon center?

This section introduces 2-digit and 3-digit subtraction. Similar to addition, the program encourages students to process mentally to ensure "smoother progress" in future levels. Preparation for Multiplication: Around worksheet 141, students are often introduced to multiplication tables (2 to 10)

Moving from single-digit to 3-digit numbers, emphasizing mental carry-overs.