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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 106 · 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 198 =
  2. 2.Half of 172 =
  3. 3.Double 28 =
  4. 4.Double 82 =
  5. 5.Double 91 =
  6. 6.Double 29 =
  7. 7.Half of 182 =
  8. 8.Double 15 =
  9. 9.Half of 104 =
  10. 10.Half of 108 =
  11. 11.Half of 118 =
  12. 12.Half of 28 =
  13. 13.Double 71 =
  14. 14.Double 55 =
  15. 15.Double 33 =
  16. 16.Double 69 =
  17. 17.Half of 58 =
  18. 18.Half of 112 =
  19. 19.Half of 188 =
  20. 20.Half of 114 =
  21. 21.Half of 116 =
  22. 22.Half of 68 =
  23. 23.Double 88 =
  24. 24.Half of 164 =
  25. 25.Double 26 =
  26. 26.Double 21 =
  27. 27.Double 43 =
  28. 28.Double 62 =
  29. 29.Double 45 =
  30. 30.Half of 168 =
  31. 31.Half of 52 =
  32. 32.Half of 156 =
  33. 33.Double 25 =
  34. 34.Double 23 =
  35. 35.Half of 46 =
  36. 36.Half of 86 =
  37. 37.Half of 18 =
  38. 38.Double 42 =
  39. 39.Half of 128 =
  40. 40.Double 35 =

Answer key

  1. 99
  2. 86
  3. 56
  4. 164
  5. 182
  6. 58
  7. 91
  8. 30
  9. 52
  10. 54
  11. 59
  12. 14
  13. 142
  14. 110
  15. 66
  16. 138
  17. 29
  18. 56
  19. 94
  20. 57
  21. 58
  22. 34
  23. 176
  24. 82
  25. 52
  26. 42
  27. 86
  28. 124
  29. 90
  30. 84
  31. 26
  32. 78
  33. 50
  34. 46
  35. 23
  36. 43
  37. 9
  38. 84
  39. 64
  40. 70

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