See free Year 1 subtraction within 20 worked examples with clear strategies and answers, aligned to the England primary curriculum.
Try each question first, then compare the strategy and answer. The aim is to understand the method, not just copy the final result.
How to think about it: Decide which operation the question needs, keep tens/ones or larger place values aligned, and calculate in manageable steps. Check with the inverse operation where possible. Cross out 3 counters if helpful.
Answer: 7
How to think about it: Decide which operation the question needs, keep tens/ones or larger place values aligned, and calculate in manageable steps. Check with the inverse operation where possible.
Answer: 12
How to think about it: Decide which operation the question needs, keep tens/ones or larger place values aligned, and calculate in manageable steps. Check with the inverse operation where possible.
Answer: 4
How to think about it: Decide which operation the question needs, keep tens/ones or larger place values aligned, and calculate in manageable steps. Check with the inverse operation where possible.
Answer: 7 balloons