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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 80?

    80 · Doubling & halving

  2. 2. What is double 19?

    19 · Doubling & halving

  3. 3. What is double 35?

    35 · Doubling & halving

  4. 4. What is half of 74?

    74 · Doubling & halving

  5. 5. What is double 46?

    46 · Doubling & halving

  6. 6. What is double 38?

    38 · Doubling & halving

  7. 7. What is half of 90?

    90 · Doubling & halving

  8. 8. What is double 10?

    10 · Doubling & halving

  9. 9. What is double 20?

    20 · Doubling & halving

  10. 10. What is half of 24?

    24 · Doubling & halving

  11. 11. What is half of 94?

    94 · Doubling & halving

  12. 12. What is half of 84?

    84 · Doubling & halving
12 questions · Seed 58 · 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 80?

    40

    Half of 80 is 80 ÷ 2 = 40.

  2. 2. What is double 19?

    38

    Double 19 is 19 + 19 = 38.

  3. 3. What is double 35?

    70

    Double 35 is 35 + 35 = 70.

  4. 4. What is half of 74?

    37

    Half of 74 is 74 ÷ 2 = 37.

  5. 5. What is double 46?

    92

    Double 46 is 46 + 46 = 92.

  6. 6. What is double 38?

    76

    Double 38 is 38 + 38 = 76.

  7. 7. What is half of 90?

    45

    Half of 90 is 90 ÷ 2 = 45.

  8. 8. What is double 10?

    20

    Double 10 is 10 + 10 = 20.

  9. 9. What is double 20?

    40

    Double 20 is 20 + 20 = 40.

  10. 10. What is half of 24?

    12

    Half of 24 is 24 ÷ 2 = 12.

  11. 11. What is half of 94?

    47

    Half of 94 is 94 ÷ 2 = 47.

  12. 12. What is half of 84?

    42

    Half of 84 is 84 ÷ 2 = 42.

12 questions · Seed 58 · 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 80?

    80 · Doubling & halving

  2. 2. What is double 19?

    19 · Doubling & halving

  3. 3. What is double 35?

    35 · Doubling & halving

  4. 4. What is half of 74?

    74 · Doubling & halving

  5. 5. What is double 46?

    46 · Doubling & halving

  6. 6. What is double 38?

    38 · Doubling & halving

  7. 7. What is half of 90?

    90 · Doubling & halving

  8. 8. What is double 10?

    10 · Doubling & halving

  9. 9. What is double 20?

    20 · Doubling & halving

  10. 10. What is half of 24?

    24 · Doubling & halving

  11. 11. What is half of 94?

    94 · Doubling & halving

  12. 12. What is half of 84?

    84 · Doubling & halving
12 questions · Seed 58 · 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 80?

    40

    Half of 80 is 80 ÷ 2 = 40.

  2. 2. What is double 19?

    38

    Double 19 is 19 + 19 = 38.

  3. 3. What is double 35?

    70

    Double 35 is 35 + 35 = 70.

  4. 4. What is half of 74?

    37

    Half of 74 is 74 ÷ 2 = 37.

  5. 5. What is double 46?

    92

    Double 46 is 46 + 46 = 92.

  6. 6. What is double 38?

    76

    Double 38 is 38 + 38 = 76.

  7. 7. What is half of 90?

    45

    Half of 90 is 90 ÷ 2 = 45.

  8. 8. What is double 10?

    20

    Double 10 is 10 + 10 = 20.

  9. 9. What is double 20?

    40

    Double 20 is 20 + 20 = 40.

  10. 10. What is half of 24?

    12

    Half of 24 is 24 ÷ 2 = 12.

  11. 11. What is half of 94?

    47

    Half of 94 is 94 ÷ 2 = 47.

  12. 12. What is half of 84?

    42

    Half of 84 is 84 ÷ 2 = 42.

12 questions · Seed 58 · Age guidance, not curriculum certification