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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 40?

    40 · Doubling & halving

  2. 2. What is half of 66?

    66 · Doubling & halving

  3. 3. What is double 37?

    37 · Doubling & halving

  4. 4. What is half of 54?

    54 · Doubling & halving

  5. 5. What is double 8?

    8 · Doubling & halving

  6. 6. What is double 30?

    30 · Doubling & halving

  7. 7. What is double 27?

    27 · Doubling & halving

  8. 8. What is half of 72?

    72 · Doubling & halving

  9. 9. What is half of 12?

    12 · Doubling & halving

  10. 10. What is half of 14?

    14 · Doubling & halving

  11. 11. What is half of 40?

    40 · Doubling & halving

  12. 12. What is double 24?

    24 · Doubling & halving
12 questions · Seed 42 · 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 40?

    80

    Double 40 is 40 + 40 = 80.

  2. 2. What is half of 66?

    33

    Half of 66 is 66 ÷ 2 = 33.

  3. 3. What is double 37?

    74

    Double 37 is 37 + 37 = 74.

  4. 4. What is half of 54?

    27

    Half of 54 is 54 ÷ 2 = 27.

  5. 5. What is double 8?

    16

    Double 8 is 8 + 8 = 16.

  6. 6. What is double 30?

    60

    Double 30 is 30 + 30 = 60.

  7. 7. What is double 27?

    54

    Double 27 is 27 + 27 = 54.

  8. 8. What is half of 72?

    36

    Half of 72 is 72 ÷ 2 = 36.

  9. 9. What is half of 12?

    6

    Half of 12 is 12 ÷ 2 = 6.

  10. 10. What is half of 14?

    7

    Half of 14 is 14 ÷ 2 = 7.

  11. 11. What is half of 40?

    20

    Half of 40 is 40 ÷ 2 = 20.

  12. 12. What is double 24?

    48

    Double 24 is 24 + 24 = 48.

12 questions · Seed 42 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9

Doubling & halving

Take your time. Show your thinking.

  1. 1. What is double 40?

    40 · Doubling & halving

  2. 2. What is half of 66?

    66 · Doubling & halving

  3. 3. What is double 37?

    37 · Doubling & halving

  4. 4. What is half of 54?

    54 · Doubling & halving

  5. 5. What is double 8?

    8 · Doubling & halving

  6. 6. What is double 30?

    30 · Doubling & halving

  7. 7. What is double 27?

    27 · Doubling & halving

  8. 8. What is half of 72?

    72 · Doubling & halving

  9. 9. What is half of 12?

    12 · Doubling & halving

  10. 10. What is half of 14?

    14 · Doubling & halving

  11. 11. What is half of 40?

    40 · Doubling & halving

  12. 12. What is double 24?

    24 · Doubling & halving
12 questions · Seed 42 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9

Doubling & halving

Answers and reasoning. Review before teaching.

  1. 1. What is double 40?

    80

    Double 40 is 40 + 40 = 80.

  2. 2. What is half of 66?

    33

    Half of 66 is 66 ÷ 2 = 33.

  3. 3. What is double 37?

    74

    Double 37 is 37 + 37 = 74.

  4. 4. What is half of 54?

    27

    Half of 54 is 54 ÷ 2 = 27.

  5. 5. What is double 8?

    16

    Double 8 is 8 + 8 = 16.

  6. 6. What is double 30?

    60

    Double 30 is 30 + 30 = 60.

  7. 7. What is double 27?

    54

    Double 27 is 27 + 27 = 54.

  8. 8. What is half of 72?

    36

    Half of 72 is 72 ÷ 2 = 36.

  9. 9. What is half of 12?

    6

    Half of 12 is 12 ÷ 2 = 6.

  10. 10. What is half of 14?

    7

    Half of 14 is 14 ÷ 2 = 7.

  11. 11. What is half of 40?

    20

    Half of 40 is 40 ÷ 2 = 20.

  12. 12. What is double 24?

    48

    Double 24 is 24 + 24 = 48.

12 questions · Seed 42 · Age guidance, not curriculum certification