Missing Numbers 1 to 20 Worksheets
Write the number that comes before, after or between the numbers shown.
Missing Numbers 1 to 20
Name:Date:Score:
Write the missing number: the one before, the one after, or the one in between.
- 1 5
- 210
- 32 4
- 4 18
- 55
- 61 3
- 7 8
- 86
- 98 10
- 10 18
- 114
- 1218 20
Printable Worksheets for Kids · printableworksheetsforkids.pages.dev
Missing Numbers 1 to 20
Name:Date:Score:
Write the missing number: the one before, the one after, or the one in between.
- 1 9
- 215
- 314 16
- 4 15
- 52
- 62 4
- 7 5
- 813
- 99 11
- 10 5
- 1112
- 127 9
Printable Worksheets for Kids · printableworksheetsforkids.pages.dev
Missing Numbers 1 to 20
Name:Date:Score:
Write the missing number: the one before, the one after, or the one in between.
- 1 2
- 211
- 310 12
- 4 19
- 52
- 68 10
- 7 9
- 813
- 99 11
- 10 18
- 1115
- 125 7
Printable Worksheets for Kids · printableworksheetsforkids.pages.dev
Answer key — Sheet A (12 answers)
- 1. 4
- 2. 11
- 3. 3
- 4. 17
- 5. 6
- 6. 2
- 7. 7
- 8. 7
- 9. 9
- 10. 17
- 11. 5
- 12. 19
Answer key — Sheet B (12 answers)
- 1. 8
- 2. 16
- 3. 15
- 4. 14
- 5. 3
- 6. 3
- 7. 4
- 8. 14
- 9. 10
- 10. 4
- 11. 13
- 12. 8
Answer key — Sheet C (12 answers)
- 1. 1
- 2. 12
- 3. 11
- 4. 18
- 5. 3
- 6. 9
- 7. 8
- 8. 14
- 9. 10
- 10. 17
- 11. 16
- 12. 6
About this skill
Knowing what comes before and after a number is the start of mental number lines. Children learn that every number sits between its neighbours, which prepares them for adding and subtracting one.
How to teach it
- Say each number aloud while tracing it and count with real objects alongside the sheet.
- Keep sessions to five or ten minutes and stop while the child still wants more.
- Use the answer key to check, then praise effort rather than speed.
Mistakes to watch for
- Writing digits backwards or from the bottom up — model the starting point and the direction of each stroke.
- Counting a ten frame without touching each counter, which causes skipped or double-counted items.
