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MathsAges 7-9

Doubling & halving

Double a whole number or find half of an even number to build rapid mental arithmetic. 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 7-9

Doubling & halving

Take your time. Show your thinking.

  1. 1. What is half of 54?

    54 · Doubling & halving

  2. 2. What is double 28?

    28 · Doubling & halving

  3. 3. What is half of 18?

    18 · Doubling & halving

  4. 4. What is double 29?

    29 · Doubling & halving

  5. 5. What is double 41?

    41 · Doubling & halving

  6. 6. What is half of 12?

    12 · Doubling & halving

  7. 7. What is double 26?

    26 · Doubling & halving

  8. 8. What is double 20?

    20 · Doubling & halving

  9. 9. What is half of 24?

    24 · Doubling & halving

  10. 10. What is double 12?

    12 · Doubling & halving

  11. 11. What is half of 92?

    92 · Doubling & halving

  12. 12. What is double 25?

    25 · Doubling & halving
12 questions · Seed 52 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 7-9

Doubling & halving

Answers and reasoning. Review before teaching.

  1. 1. What is half of 54?

    27

    Half of 54 is 54 ÷ 2 = 27.

  2. 2. What is double 28?

    56

    Double 28 is 28 + 28 = 56.

  3. 3. What is half of 18?

    9

    Half of 18 is 18 ÷ 2 = 9.

  4. 4. What is double 29?

    58

    Double 29 is 29 + 29 = 58.

  5. 5. What is double 41?

    82

    Double 41 is 41 + 41 = 82.

  6. 6. What is half of 12?

    6

    Half of 12 is 12 ÷ 2 = 6.

  7. 7. What is double 26?

    52

    Double 26 is 26 + 26 = 52.

  8. 8. What is double 20?

    40

    Double 20 is 20 + 20 = 40.

  9. 9. What is half of 24?

    12

    Half of 24 is 24 ÷ 2 = 12.

  10. 10. What is double 12?

    24

    Double 12 is 12 + 12 = 24.

  11. 11. What is half of 92?

    46

    Half of 92 is 92 ÷ 2 = 46.

  12. 12. What is double 25?

    50

    Double 25 is 25 + 25 = 50.

12 questions · Seed 52 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9

Doubling & halving

Take your time. Show your thinking.

  1. 1. What is half of 54?

    54 · Doubling & halving

  2. 2. What is double 28?

    28 · Doubling & halving

  3. 3. What is half of 18?

    18 · Doubling & halving

  4. 4. What is double 29?

    29 · Doubling & halving

  5. 5. What is double 41?

    41 · Doubling & halving

  6. 6. What is half of 12?

    12 · Doubling & halving

  7. 7. What is double 26?

    26 · Doubling & halving

  8. 8. What is double 20?

    20 · Doubling & halving

  9. 9. What is half of 24?

    24 · Doubling & halving

  10. 10. What is double 12?

    12 · Doubling & halving

  11. 11. What is half of 92?

    92 · Doubling & halving

  12. 12. What is double 25?

    25 · Doubling & halving
12 questions · Seed 52 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9

Doubling & halving

Answers and reasoning. Review before teaching.

  1. 1. What is half of 54?

    27

    Half of 54 is 54 ÷ 2 = 27.

  2. 2. What is double 28?

    56

    Double 28 is 28 + 28 = 56.

  3. 3. What is half of 18?

    9

    Half of 18 is 18 ÷ 2 = 9.

  4. 4. What is double 29?

    58

    Double 29 is 29 + 29 = 58.

  5. 5. What is double 41?

    82

    Double 41 is 41 + 41 = 82.

  6. 6. What is half of 12?

    6

    Half of 12 is 12 ÷ 2 = 6.

  7. 7. What is double 26?

    52

    Double 26 is 26 + 26 = 52.

  8. 8. What is double 20?

    40

    Double 20 is 20 + 20 = 40.

  9. 9. What is half of 24?

    12

    Half of 24 is 24 ÷ 2 = 12.

  10. 10. What is double 12?

    24

    Double 12 is 12 + 12 = 24.

  11. 11. What is half of 92?

    46

    Half of 92 is 92 ÷ 2 = 46.

  12. 12. What is double 25?

    50

    Double 25 is 25 + 25 = 50.

12 questions · Seed 52 · Age guidance, not curriculum certification