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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 750 · 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 68 =
  2. 2.Double 45 =
  3. 3.Double 27 =
  4. 4.Double 21 =
  5. 5.Double 82 =
  6. 6.Half of 62 =
  7. 7.Half of 114 =
  8. 8.Half of 184 =
  9. 9.Half of 14 =
  10. 10.Double 79 =
  11. 11.Double 98 =
  12. 12.Double 11 =
  13. 13.Double 34 =
  14. 14.Half of 54 =
  15. 15.Half of 72 =
  16. 16.Half of 116 =
  17. 17.Double 86 =
  18. 18.Half of 118 =
  19. 19.Double 36 =
  20. 20.Double 94 =
  21. 21.Half of 166 =
  22. 22.Double 39 =
  23. 23.Half of 76 =
  24. 24.Double 99 =
  25. 25.Half of 52 =
  26. 26.Half of 84 =
  27. 27.Double 12 =
  28. 28.Half of 124 =
  29. 29.Half of 158 =
  30. 30.Double 16 =
  31. 31.Double 35 =
  32. 32.Half of 152 =
  33. 33.Double 81 =
  34. 34.Half of 12 =
  35. 35.Double 13 =
  36. 36.Half of 36 =
  37. 37.Double 65 =
  38. 38.Double 97 =
  39. 39.Half of 16 =
  40. 40.Double 54 =

Answer key

  1. 34
  2. 90
  3. 54
  4. 42
  5. 164
  6. 31
  7. 57
  8. 92
  9. 7
  10. 158
  11. 196
  12. 22
  13. 68
  14. 27
  15. 36
  16. 58
  17. 172
  18. 59
  19. 72
  20. 188
  21. 83
  22. 78
  23. 38
  24. 198
  25. 26
  26. 42
  27. 24
  28. 62
  29. 79
  30. 32
  31. 70
  32. 76
  33. 162
  34. 6
  35. 26
  36. 18
  37. 130
  38. 194
  39. 8
  40. 108

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