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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 double 31?

    31 · Doubling & halving

  2. 2. What is double 47?

    47 · Doubling & halving

  3. 3. What is half of 72?

    72 · Doubling & halving

  4. 4. What is half of 78?

    78 · Doubling & halving

  5. 5. What is half of 14?

    14 · Doubling & halving

  6. 6. What is double 28?

    28 · Doubling & halving

  7. 7. What is half of 88?

    88 · Doubling & halving

  8. 8. What is double 46?

    46 · Doubling & halving

  9. 9. What is half of 80?

    80 · Doubling & halving

  10. 10. What is half of 70?

    70 · Doubling & halving

  11. 11. What is double 39?

    39 · Doubling & halving

  12. 12. What is double 10?

    10 · Doubling & halving
12 questions · Seed 104730 · 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 double 31?

    62

    Double 31 is 31 + 31 = 62.

  2. 2. What is double 47?

    94

    Double 47 is 47 + 47 = 94.

  3. 3. What is half of 72?

    36

    Half of 72 is 72 ÷ 2 = 36.

  4. 4. What is half of 78?

    39

    Half of 78 is 78 ÷ 2 = 39.

  5. 5. What is half of 14?

    7

    Half of 14 is 14 ÷ 2 = 7.

  6. 6. What is double 28?

    56

    Double 28 is 28 + 28 = 56.

  7. 7. What is half of 88?

    44

    Half of 88 is 88 ÷ 2 = 44.

  8. 8. What is double 46?

    92

    Double 46 is 46 + 46 = 92.

  9. 9. What is half of 80?

    40

    Half of 80 is 80 ÷ 2 = 40.

  10. 10. What is half of 70?

    35

    Half of 70 is 70 ÷ 2 = 35.

  11. 11. What is double 39?

    78

    Double 39 is 39 + 39 = 78.

  12. 12. What is double 10?

    20

    Double 10 is 10 + 10 = 20.

12 questions · Seed 104730 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9

Doubling & halving

Take your time. Show your thinking.

  1. 1. What is double 31?

    31 · Doubling & halving

  2. 2. What is double 47?

    47 · Doubling & halving

  3. 3. What is half of 72?

    72 · Doubling & halving

  4. 4. What is half of 78?

    78 · Doubling & halving

  5. 5. What is half of 14?

    14 · Doubling & halving

  6. 6. What is double 28?

    28 · Doubling & halving

  7. 7. What is half of 88?

    88 · Doubling & halving

  8. 8. What is double 46?

    46 · Doubling & halving

  9. 9. What is half of 80?

    80 · Doubling & halving

  10. 10. What is half of 70?

    70 · Doubling & halving

  11. 11. What is double 39?

    39 · Doubling & halving

  12. 12. What is double 10?

    10 · Doubling & halving
12 questions · Seed 104730 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9

Doubling & halving

Answers and reasoning. Review before teaching.

  1. 1. What is double 31?

    62

    Double 31 is 31 + 31 = 62.

  2. 2. What is double 47?

    94

    Double 47 is 47 + 47 = 94.

  3. 3. What is half of 72?

    36

    Half of 72 is 72 ÷ 2 = 36.

  4. 4. What is half of 78?

    39

    Half of 78 is 78 ÷ 2 = 39.

  5. 5. What is half of 14?

    7

    Half of 14 is 14 ÷ 2 = 7.

  6. 6. What is double 28?

    56

    Double 28 is 28 + 28 = 56.

  7. 7. What is half of 88?

    44

    Half of 88 is 88 ÷ 2 = 44.

  8. 8. What is double 46?

    92

    Double 46 is 46 + 46 = 92.

  9. 9. What is half of 80?

    40

    Half of 80 is 80 ÷ 2 = 40.

  10. 10. What is half of 70?

    35

    Half of 70 is 70 ÷ 2 = 35.

  11. 11. What is double 39?

    78

    Double 39 is 39 + 39 = 78.

  12. 12. What is double 10?

    20

    Double 10 is 10 + 10 = 20.

12 questions · Seed 104730 · Age guidance, not curriculum certification