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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 689 · 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 18 =
  2. 2.Double 84 =
  3. 3.Half of 52 =
  4. 4.Double 23 =
  5. 5.Half of 114 =
  6. 6.Double 65 =
  7. 7.Half of 118 =
  8. 8.Double 51 =
  9. 9.Double 43 =
  10. 10.Double 69 =
  11. 11.Double 61 =
  12. 12.Double 76 =
  13. 13.Double 86 =
  14. 14.Half of 124 =
  15. 15.Half of 42 =
  16. 16.Half of 54 =
  17. 17.Double 22 =
  18. 18.Half of 12 =
  19. 19.Half of 18 =
  20. 20.Double 38 =
  21. 21.Half of 48 =
  22. 22.Half of 58 =
  23. 23.Double 71 =
  24. 24.Double 73 =
  25. 25.Double 95 =
  26. 26.Half of 22 =
  27. 27.Double 33 =
  28. 28.Double 87 =
  29. 29.Double 81 =
  30. 30.Half of 76 =
  31. 31.Half of 176 =
  32. 32.Double 11 =
  33. 33.Half of 66 =
  34. 34.Double 78 =
  35. 35.Double 89 =
  36. 36.Double 85 =
  37. 37.Double 41 =
  38. 38.Double 52 =
  39. 39.Half of 136 =
  40. 40.Double 72 =

Answer key

  1. 36
  2. 168
  3. 26
  4. 46
  5. 57
  6. 130
  7. 59
  8. 102
  9. 86
  10. 138
  11. 122
  12. 152
  13. 172
  14. 62
  15. 21
  16. 27
  17. 44
  18. 6
  19. 9
  20. 76
  21. 24
  22. 29
  23. 142
  24. 146
  25. 190
  26. 11
  27. 66
  28. 174
  29. 162
  30. 38
  31. 88
  32. 22
  33. 33
  34. 156
  35. 178
  36. 170
  37. 82
  38. 104
  39. 68
  40. 144

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