Grades 1–2
Subtraction Facts Within 20
Thirty subtraction facts from 20 and below. Every answer is 0 or more.
Math worksheet · Addition and subtraction practice
Addition Facts Within 20
Thirty addition facts with sums up to 20, mixed so kids can’t just count on from the last one.
- Grade level
- Grades 1–2
- Time
- About 15 minutes
- Answer key
- Yes, page 2 of the PDF
- Kids practice
- Addition and subtraction facts, Regrouping, Mental math strategies, Checking with the inverse
What kids do
“Add. Can you finish all 30 before the timer rings?”
Sample problems
- 5+3 =
- 6+1 =
- 2+2 =
- 2+8 =
- 3+7 =
- 5+2 =
Teacher tip
Use it as a baseline at the start of a unit, then again at the end. Kids love seeing their own time drop.
How to use it
- Keep a number line or hundred chart taped to the desk for kids who need it.
- Use it as a timed sheet once a week and have kids chart their own score.
- Do the first problem together under a document camera, then let kids finish on their own.
Watch for
Columns that drift. Turn lined paper sideways or use graph paper to keep digits lined up.
Talk about it
- Which answer could you check by doing the opposite operation?
- Which problem was the hardest? What made it hard?
Take it further
Have kids make their own fact family triangles for a partner to solve.
US Letter, prints well in black and white. Free for home and classroom use: print as many copies as you need.
More addition and subtraction practice worksheets
Grades 2–3
Two-Digit Addition and Subtraction
Twenty stacked problems with two-digit numbers, about half with regrouping (carrying and borrowing).
3rd grade
Three-Digit Addition and Subtraction
Fifteen three-digit problems with regrouping across the ones, tens and hundreds.
Grades 1–2
Doubles and Doubles Plus One
Ten doubles facts (6 + 6) and ten near-doubles (6 + 7), with the doubles pictured so kids see the trick.
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