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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 86?

    86 · Doubling & halving

  2. 2. What is half of 20?

    20 · Doubling & halving

  3. 3. What is double 34?

    34 · Doubling & halving

  4. 4. What is double 15?

    15 · Doubling & halving

  5. 5. What is double 45?

    45 · Doubling & halving

  6. 6. What is double 23?

    23 · Doubling & halving

  7. 7. What is half of 88?

    88 · Doubling & halving

  8. 8. What is half of 74?

    74 · Doubling & halving

  9. 9. What is double 8?

    8 · Doubling & halving

  10. 10. What is double 10?

    10 · Doubling & halving

  11. 11. What is half of 42?

    42 · Doubling & halving

  12. 12. What is half of 46?

    46 · Doubling & halving
12 questions · Seed 104739 · 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 86?

    43

    Half of 86 is 86 ÷ 2 = 43.

  2. 2. What is half of 20?

    10

    Half of 20 is 20 ÷ 2 = 10.

  3. 3. What is double 34?

    68

    Double 34 is 34 + 34 = 68.

  4. 4. What is double 15?

    30

    Double 15 is 15 + 15 = 30.

  5. 5. What is double 45?

    90

    Double 45 is 45 + 45 = 90.

  6. 6. What is double 23?

    46

    Double 23 is 23 + 23 = 46.

  7. 7. What is half of 88?

    44

    Half of 88 is 88 ÷ 2 = 44.

  8. 8. What is half of 74?

    37

    Half of 74 is 74 ÷ 2 = 37.

  9. 9. What is double 8?

    16

    Double 8 is 8 + 8 = 16.

  10. 10. What is double 10?

    20

    Double 10 is 10 + 10 = 20.

  11. 11. What is half of 42?

    21

    Half of 42 is 42 ÷ 2 = 21.

  12. 12. What is half of 46?

    23

    Half of 46 is 46 ÷ 2 = 23.

12 questions · Seed 104739 · 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 86?

    86 · Doubling & halving

  2. 2. What is half of 20?

    20 · Doubling & halving

  3. 3. What is double 34?

    34 · Doubling & halving

  4. 4. What is double 15?

    15 · Doubling & halving

  5. 5. What is double 45?

    45 · Doubling & halving

  6. 6. What is double 23?

    23 · Doubling & halving

  7. 7. What is half of 88?

    88 · Doubling & halving

  8. 8. What is half of 74?

    74 · Doubling & halving

  9. 9. What is double 8?

    8 · Doubling & halving

  10. 10. What is double 10?

    10 · Doubling & halving

  11. 11. What is half of 42?

    42 · Doubling & halving

  12. 12. What is half of 46?

    46 · Doubling & halving
12 questions · Seed 104739 · 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 86?

    43

    Half of 86 is 86 ÷ 2 = 43.

  2. 2. What is half of 20?

    10

    Half of 20 is 20 ÷ 2 = 10.

  3. 3. What is double 34?

    68

    Double 34 is 34 + 34 = 68.

  4. 4. What is double 15?

    30

    Double 15 is 15 + 15 = 30.

  5. 5. What is double 45?

    90

    Double 45 is 45 + 45 = 90.

  6. 6. What is double 23?

    46

    Double 23 is 23 + 23 = 46.

  7. 7. What is half of 88?

    44

    Half of 88 is 88 ÷ 2 = 44.

  8. 8. What is half of 74?

    37

    Half of 74 is 74 ÷ 2 = 37.

  9. 9. What is double 8?

    16

    Double 8 is 8 + 8 = 16.

  10. 10. What is double 10?

    20

    Double 10 is 10 + 10 = 20.

  11. 11. What is half of 42?

    21

    Half of 42 is 42 ÷ 2 = 21.

  12. 12. What is half of 46?

    23

    Half of 46 is 46 ÷ 2 = 23.

12 questions · Seed 104739 · Age guidance, not curriculum certification