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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 242 · 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.Double 61 =
  2. 2.Half of 156 =
  3. 3.Double 81 =
  4. 4.Half of 122 =
  5. 5.Double 78 =
  6. 6.Double 53 =
  7. 7.Double 68 =
  8. 8.Half of 152 =
  9. 9.Half of 118 =
  10. 10.Half of 32 =
  11. 11.Half of 136 =
  12. 12.Double 59 =
  13. 13.Half of 172 =
  14. 14.Double 66 =
  15. 15.Double 99 =
  16. 16.Double 79 =
  17. 17.Double 55 =
  18. 18.Half of 102 =
  19. 19.Double 83 =
  20. 20.Half of 62 =
  21. 21.Double 32 =
  22. 22.Double 86 =
  23. 23.Double 94 =
  24. 24.Half of 68 =
  25. 25.Double 54 =
  26. 26.Double 33 =
  27. 27.Half of 142 =
  28. 28.Half of 174 =
  29. 29.Double 18 =
  30. 30.Half of 54 =
  31. 31.Double 19 =
  32. 32.Double 87 =
  33. 33.Double 13 =
  34. 34.Half of 112 =
  35. 35.Double 58 =
  36. 36.Half of 38 =
  37. 37.Double 89 =
  38. 38.Half of 178 =
  39. 39.Double 43 =
  40. 40.Half of 168 =

Answer key

  1. 122
  2. 78
  3. 162
  4. 61
  5. 156
  6. 106
  7. 136
  8. 76
  9. 59
  10. 16
  11. 68
  12. 118
  13. 86
  14. 132
  15. 198
  16. 158
  17. 110
  18. 51
  19. 166
  20. 31
  21. 64
  22. 172
  23. 188
  24. 34
  25. 108
  26. 66
  27. 71
  28. 87
  29. 36
  30. 27
  31. 38
  32. 174
  33. 26
  34. 56
  35. 116
  36. 19
  37. 178
  38. 89
  39. 86
  40. 84

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