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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 271 · 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 69 =
  2. 2.Double 18 =
  3. 3.Half of 58 =
  4. 4.Half of 172 =
  5. 5.Half of 68 =
  6. 6.Half of 188 =
  7. 7.Double 56 =
  8. 8.Half of 162 =
  9. 9.Half of 192 =
  10. 10.Half of 134 =
  11. 11.Double 13 =
  12. 12.Double 83 =
  13. 13.Half of 62 =
  14. 14.Half of 126 =
  15. 15.Double 75 =
  16. 16.Half of 102 =
  17. 17.Half of 182 =
  18. 18.Half of 46 =
  19. 19.Double 71 =
  20. 20.Half of 82 =
  21. 21.Double 47 =
  22. 22.Double 59 =
  23. 23.Half of 92 =
  24. 24.Double 17 =
  25. 25.Double 88 =
  26. 26.Half of 78 =
  27. 27.Half of 118 =
  28. 28.Double 21 =
  29. 29.Double 64 =
  30. 30.Double 72 =
  31. 31.Half of 184 =
  32. 32.Half of 94 =
  33. 33.Double 51 =
  34. 34.Half of 18 =
  35. 35.Half of 142 =
  36. 36.Half of 106 =
  37. 37.Double 58 =
  38. 38.Double 39 =
  39. 39.Half of 22 =
  40. 40.Double 91 =

Answer key

  1. 138
  2. 36
  3. 29
  4. 86
  5. 34
  6. 94
  7. 112
  8. 81
  9. 96
  10. 67
  11. 26
  12. 166
  13. 31
  14. 63
  15. 150
  16. 51
  17. 91
  18. 23
  19. 142
  20. 41
  21. 94
  22. 118
  23. 46
  24. 34
  25. 176
  26. 39
  27. 59
  28. 42
  29. 128
  30. 144
  31. 92
  32. 47
  33. 102
  34. 9
  35. 71
  36. 53
  37. 116
  38. 78
  39. 11
  40. 182

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