Subtract 11: Subtraction Facts
| 12 − 11 = 1 (matching addition: 11 + 1 = 12) |
| 13 − 11 = 2 (matching addition: 11 + 2 = 13) |
| 14 − 11 = 3 (matching addition: 11 + 3 = 14) |
| 15 − 11 = 4 (matching addition: 11 + 4 = 15) |
| 16 − 11 = 5 (matching addition: 11 + 5 = 16) |
| 17 − 11 = 6 (matching addition: 11 + 6 = 17) |
| 18 − 11 = 7 (matching addition: 11 + 7 = 18) |
| 19 − 11 = 8 (matching addition: 11 + 8 = 19) |
| 20 − 11 = 9 (matching addition: 11 + 9 = 20) |
| 21 − 11 = 10 (matching addition: 11 + 10 = 21) |
| 22 − 11 = 11 (matching addition: 11 + 11 = 22) |
| 23 − 11 = 12 (matching addition: 11 + 12 = 23) |
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Subtract 11 takes away ten and one, a pair of steps children already know.
The pattern in the answers
The starting numbers run 12 to 23 and the answers 1 to 12, so the starting number is always 11 more than the answer.
Tip for the subtract 11 facts
Subtract 10, then 1 more. For 17 - 11, 17 - 10 = 7 and 7 - 1 = 6.
The 3 hardest facts
- 20 − 11 = 9 (matching addition: 11 + 9 = 20)
- 21 − 11 = 10 (matching addition: 11 + 10 = 21)
- 23 − 11 = 12 (matching addition: 11 + 12 = 23)
Starting numbers past 19 change the tens digit and then step back by one, so go slowly: 21 - 10 = 11, then one less is 10.
Check with addition
Every subtraction fact is an addition fact turned around. Add the answer back to 11 to get the number you started with.
- 1 + 11 = 12, so 12 − 11 = 1
- 2 + 11 = 13, so 13 − 11 = 2
- 3 + 11 = 14, so 14 − 11 = 3
- 4 + 11 = 15, so 15 − 11 = 4
- 5 + 11 = 16, so 16 − 11 = 5
- 6 + 11 = 17, so 17 − 11 = 6
- 7 + 11 = 18, so 18 − 11 = 7
- 8 + 11 = 19, so 19 − 11 = 8
- 9 + 11 = 20, so 20 − 11 = 9
- 10 + 11 = 21, so 21 − 11 = 10
- 11 + 11 = 22, so 22 − 11 = 11
- 12 + 11 = 23, so 23 − 11 = 12
Play the subtract 11 facts game
Untimed by default. A missed fact shows its answer and comes back later in the round.
Printable subtract 11 chart
One US Letter page, clear in black and white.
Quick quiz: subtract 11 facts
10 questions, no timer. At the end you see the score, the facts to practice and a sheet you can print.
Questions parents ask
Do children need subtract 11?
It is an extension. It strengthens the subtract 10 and subtract 1 habits and links to two-digit subtraction later.
What is the quickest check for subtract 11?
Add 11 to the answer. If it does not give the starting number, one of the steps was wrong.