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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 74?

    74 · Doubling & halving

  2. 2. What is double 25?

    25 · Doubling & halving

  3. 3. What is half of 40?

    40 · Doubling & halving

  4. 4. What is double 23?

    23 · Doubling & halving

  5. 5. What is half of 90?

    90 · Doubling & halving

  6. 6. What is half of 24?

    24 · Doubling & halving

  7. 7. What is half of 78?

    78 · Doubling & halving

  8. 8. What is double 18?

    18 · Doubling & halving

  9. 9. What is half of 12?

    12 · Doubling & halving

  10. 10. What is half of 32?

    32 · Doubling & halving

  11. 11. What is half of 48?

    48 · Doubling & halving

  12. 12. What is double 7?

    7 · Doubling & halving
12 questions · Seed 54 · 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 74?

    37

    Half of 74 is 74 ÷ 2 = 37.

  2. 2. What is double 25?

    50

    Double 25 is 25 + 25 = 50.

  3. 3. What is half of 40?

    20

    Half of 40 is 40 ÷ 2 = 20.

  4. 4. What is double 23?

    46

    Double 23 is 23 + 23 = 46.

  5. 5. What is half of 90?

    45

    Half of 90 is 90 ÷ 2 = 45.

  6. 6. What is half of 24?

    12

    Half of 24 is 24 ÷ 2 = 12.

  7. 7. What is half of 78?

    39

    Half of 78 is 78 ÷ 2 = 39.

  8. 8. What is double 18?

    36

    Double 18 is 18 + 18 = 36.

  9. 9. What is half of 12?

    6

    Half of 12 is 12 ÷ 2 = 6.

  10. 10. What is half of 32?

    16

    Half of 32 is 32 ÷ 2 = 16.

  11. 11. What is half of 48?

    24

    Half of 48 is 48 ÷ 2 = 24.

  12. 12. What is double 7?

    14

    Double 7 is 7 + 7 = 14.

12 questions · Seed 54 · 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 74?

    74 · Doubling & halving

  2. 2. What is double 25?

    25 · Doubling & halving

  3. 3. What is half of 40?

    40 · Doubling & halving

  4. 4. What is double 23?

    23 · Doubling & halving

  5. 5. What is half of 90?

    90 · Doubling & halving

  6. 6. What is half of 24?

    24 · Doubling & halving

  7. 7. What is half of 78?

    78 · Doubling & halving

  8. 8. What is double 18?

    18 · Doubling & halving

  9. 9. What is half of 12?

    12 · Doubling & halving

  10. 10. What is half of 32?

    32 · Doubling & halving

  11. 11. What is half of 48?

    48 · Doubling & halving

  12. 12. What is double 7?

    7 · Doubling & halving
12 questions · Seed 54 · 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 74?

    37

    Half of 74 is 74 ÷ 2 = 37.

  2. 2. What is double 25?

    50

    Double 25 is 25 + 25 = 50.

  3. 3. What is half of 40?

    20

    Half of 40 is 40 ÷ 2 = 20.

  4. 4. What is double 23?

    46

    Double 23 is 23 + 23 = 46.

  5. 5. What is half of 90?

    45

    Half of 90 is 90 ÷ 2 = 45.

  6. 6. What is half of 24?

    12

    Half of 24 is 24 ÷ 2 = 12.

  7. 7. What is half of 78?

    39

    Half of 78 is 78 ÷ 2 = 39.

  8. 8. What is double 18?

    36

    Double 18 is 18 + 18 = 36.

  9. 9. What is half of 12?

    6

    Half of 12 is 12 ÷ 2 = 6.

  10. 10. What is half of 32?

    16

    Half of 32 is 32 ÷ 2 = 16.

  11. 11. What is half of 48?

    24

    Half of 48 is 48 ÷ 2 = 24.

  12. 12. What is double 7?

    14

    Double 7 is 7 + 7 = 14.

12 questions · Seed 54 · Age guidance, not curriculum certification