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MathsAges 4-6

One more & one less

Find the number that is 1, 2 or 10 more or less than a given whole number. Review suitability for your learners before teaching.

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Age band:Ages 4-6Ages 7-9

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Worksheet StudioPractice pack · Ages 4-6

One more & one less

Take your time. Show your thinking.

  1. 1. What number is 1 more than 15?

    1 m · 15 · One more & one less

  2. 2. What number is 1 less than 20?

    1 · 20 · One more & one less

  3. 3. What number is 1 less than 2?

    1 · 2 · One more & one less

  4. 4. What number is 1 more than 18?

    1 m · 18 · One more & one less

  5. 5. What number is 1 less than 9?

    1 · 9 · One more & one less

  6. 6. What number is 1 more than 2?

    1 m · 2 · One more & one less

  7. 7. What number is 1 less than 3?

    1 · 3 · One more & one less

  8. 8. What number is 1 less than 12?

    1 · 12 · One more & one less

  9. 9. What number is 1 more than 12?

    1 m · 12 · One more & one less

  10. 10. What number is 1 more than 10?

    1 m · 10 · One more & one less

  11. 11. What number is 1 more than 7?

    1 m · 7 · One more & one less

  12. 12. What number is 1 less than 13?

    1 · 13 · One more & one less
12 questions · Seed 53 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 4-6

One more & one less

Answers and reasoning. Review before teaching.

  1. 1. What number is 1 more than 15?

    16

    1 more than 15 is 15 + 1 = 16.

  2. 2. What number is 1 less than 20?

    19

    1 less than 20 is 20 − 1 = 19.

  3. 3. What number is 1 less than 2?

    1

    1 less than 2 is 2 − 1 = 1.

  4. 4. What number is 1 more than 18?

    19

    1 more than 18 is 18 + 1 = 19.

  5. 5. What number is 1 less than 9?

    8

    1 less than 9 is 9 − 1 = 8.

  6. 6. What number is 1 more than 2?

    3

    1 more than 2 is 2 + 1 = 3.

  7. 7. What number is 1 less than 3?

    2

    1 less than 3 is 3 − 1 = 2.

  8. 8. What number is 1 less than 12?

    11

    1 less than 12 is 12 − 1 = 11.

  9. 9. What number is 1 more than 12?

    13

    1 more than 12 is 12 + 1 = 13.

  10. 10. What number is 1 more than 10?

    11

    1 more than 10 is 10 + 1 = 11.

  11. 11. What number is 1 more than 7?

    8

    1 more than 7 is 7 + 1 = 8.

  12. 12. What number is 1 less than 13?

    12

    1 less than 13 is 13 − 1 = 12.

12 questions · Seed 53 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 4-6

One more & one less

Take your time. Show your thinking.

  1. 1. What number is 1 more than 15?

    1 m · 15 · One more & one less

  2. 2. What number is 1 less than 20?

    1 · 20 · One more & one less

  3. 3. What number is 1 less than 2?

    1 · 2 · One more & one less

  4. 4. What number is 1 more than 18?

    1 m · 18 · One more & one less

  5. 5. What number is 1 less than 9?

    1 · 9 · One more & one less

  6. 6. What number is 1 more than 2?

    1 m · 2 · One more & one less

  7. 7. What number is 1 less than 3?

    1 · 3 · One more & one less

  8. 8. What number is 1 less than 12?

    1 · 12 · One more & one less

  9. 9. What number is 1 more than 12?

    1 m · 12 · One more & one less

  10. 10. What number is 1 more than 10?

    1 m · 10 · One more & one less

  11. 11. What number is 1 more than 7?

    1 m · 7 · One more & one less

  12. 12. What number is 1 less than 13?

    1 · 13 · One more & one less
12 questions · Seed 53 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 4-6

One more & one less

Answers and reasoning. Review before teaching.

  1. 1. What number is 1 more than 15?

    16

    1 more than 15 is 15 + 1 = 16.

  2. 2. What number is 1 less than 20?

    19

    1 less than 20 is 20 − 1 = 19.

  3. 3. What number is 1 less than 2?

    1

    1 less than 2 is 2 − 1 = 1.

  4. 4. What number is 1 more than 18?

    19

    1 more than 18 is 18 + 1 = 19.

  5. 5. What number is 1 less than 9?

    8

    1 less than 9 is 9 − 1 = 8.

  6. 6. What number is 1 more than 2?

    3

    1 more than 2 is 2 + 1 = 3.

  7. 7. What number is 1 less than 3?

    2

    1 less than 3 is 3 − 1 = 2.

  8. 8. What number is 1 less than 12?

    11

    1 less than 12 is 12 − 1 = 11.

  9. 9. What number is 1 more than 12?

    13

    1 more than 12 is 12 + 1 = 13.

  10. 10. What number is 1 more than 10?

    11

    1 more than 10 is 10 + 1 = 11.

  11. 11. What number is 1 more than 7?

    8

    1 more than 7 is 7 + 1 = 8.

  12. 12. What number is 1 less than 13?

    12

    1 less than 13 is 13 − 1 = 12.

12 questions · Seed 53 · Age guidance, not curriculum certification