Why mixed practice
First graders often learn addition and subtraction in separate units. Real fluency shows when the two are mixed and the child has to read the sign every time. This sheet uses numbers up to 10, so every sum is within 20 and every subtraction answer is zero or more. The generator never produces negative answers.
Building speed without stress
- Time a sheet once a week, not daily. Track improvement, not ranking.
- Ask your child to circle the problems they find hard and practise those first next time.
- Point out fact families: if 7 + 5 = 12, then 12 − 5 = 7.
Adjusting the level
Start with addition only if subtraction is new. When facts within 20 are steady, try two-digit addition by setting the range to 10–50 and choosing "No regrouping". That's a gentle bridge into 2nd grade. The vertical layout helps children line up tens and ones before they meet carrying.
Each time you press "New sheet" you get a completely new set of problems, so a class can practise every day without repeating a page.