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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 217 · 40 questions
TalentJR

The trick (Split and double): Split the number into tens and ones: 37 = 30 + 7. Double each part (30 → 60, 7 → 14) — or halve each part. Add the two answers: 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.Half of 142 =
  2. 2.Half of 38 =
  3. 3.Double 15 =
  4. 4.Half of 68 =
  5. 5.Double 63 =
  6. 6.Double 86 =
  7. 7.Double 75 =
  8. 8.Double 57 =
  9. 9.Double 43 =
  10. 10.Half of 54 =
  11. 11.Half of 74 =
  12. 12.Double 32 =
  13. 13.Double 18 =
  14. 14.Double 11 =
  15. 15.Half of 16 =
  16. 16.Half of 114 =
  17. 17.Half of 154 =
  18. 18.Half of 18 =
  19. 19.Double 41 =
  20. 20.Half of 172 =
  21. 21.Half of 52 =
  22. 22.Double 48 =
  23. 23.Double 66 =
  24. 24.Double 17 =
  25. 25.Half of 192 =
  26. 26.Double 55 =
  27. 27.Half of 24 =
  28. 28.Double 34 =
  29. 29.Double 93 =
  30. 30.Half of 72 =
  31. 31.Half of 42 =
  32. 32.Half of 96 =
  33. 33.Half of 128 =
  34. 34.Half of 28 =
  35. 35.Half of 46 =
  36. 36.Double 91 =
  37. 37.Double 95 =
  38. 38.Double 35 =
  39. 39.Double 31 =
  40. 40.Half of 14 =

Answer key

  1. 71
  2. 19
  3. 30
  4. 34
  5. 126
  6. 172
  7. 150
  8. 114
  9. 86
  10. 27
  11. 37
  12. 64
  13. 36
  14. 22
  15. 8
  16. 57
  17. 77
  18. 9
  19. 82
  20. 86
  21. 26
  22. 96
  23. 132
  24. 34
  25. 96
  26. 110
  27. 12
  28. 68
  29. 186
  30. 36
  31. 21
  32. 48
  33. 64
  34. 14
  35. 23
  36. 182
  37. 190
  38. 70
  39. 62
  40. 7

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