Free printable worksheets with answer keys. Pick a level, preview the questions, then open the sheet to swap or delete any single question.
Easy: Missing addend, within 10
The blank can sit anywhere in an equation. Think of the related fact: if 8 + [ ] = 13, then 13 − 8 = 5.
Find the missing number.
Tip: tick “Step-by-step answer key” in the generator to print each step for marking.
Yes. Numbers are generated each time, and the answer key is calculated for that sheet. Swap any single question and its answer updates too.
Yes. In the generator, add more skills; each gets its own section on the sheet with its own instructions.
Yes. Generating and printing from the browser is free with no sign-up. PDF downloads need a free account.