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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 351 · 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 66 =
  2. 2.Half of 58 =
  3. 3.Double 36 =
  4. 4.Half of 112 =
  5. 5.Half of 146 =
  6. 6.Half of 28 =
  7. 7.Double 17 =
  8. 8.Double 81 =
  9. 9.Half of 176 =
  10. 10.Half of 172 =
  11. 11.Double 61 =
  12. 12.Half of 32 =
  13. 13.Double 73 =
  14. 14.Double 34 =
  15. 15.Half of 98 =
  16. 16.Half of 126 =
  17. 17.Half of 164 =
  18. 18.Half of 22 =
  19. 19.Double 23 =
  20. 20.Half of 192 =
  21. 21.Double 84 =
  22. 22.Double 41 =
  23. 23.Double 99 =
  24. 24.Half of 52 =
  25. 25.Half of 142 =
  26. 26.Half of 148 =
  27. 27.Half of 46 =
  28. 28.Half of 12 =
  29. 29.Double 89 =
  30. 30.Double 71 =
  31. 31.Half of 132 =
  32. 32.Double 91 =
  33. 33.Half of 196 =
  34. 34.Double 49 =
  35. 35.Half of 106 =
  36. 36.Half of 152 =
  37. 37.Double 14 =
  38. 38.Half of 74 =
  39. 39.Half of 64 =
  40. 40.Half of 122 =

Answer key

  1. 132
  2. 29
  3. 72
  4. 56
  5. 73
  6. 14
  7. 34
  8. 162
  9. 88
  10. 86
  11. 122
  12. 16
  13. 146
  14. 68
  15. 49
  16. 63
  17. 82
  18. 11
  19. 46
  20. 96
  21. 168
  22. 82
  23. 198
  24. 26
  25. 71
  26. 74
  27. 23
  28. 6
  29. 178
  30. 142
  31. 66
  32. 182
  33. 98
  34. 98
  35. 53
  36. 76
  37. 28
  38. 37
  39. 32
  40. 61

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