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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 89 · 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 128 =
  2. 2.Double 89 =
  3. 3.Double 94 =
  4. 4.Half of 82 =
  5. 5.Double 88 =
  6. 6.Double 91 =
  7. 7.Half of 94 =
  8. 8.Half of 34 =
  9. 9.Double 71 =
  10. 10.Double 81 =
  11. 11.Half of 12 =
  12. 12.Double 48 =
  13. 13.Half of 152 =
  14. 14.Double 53 =
  15. 15.Double 96 =
  16. 16.Half of 18 =
  17. 17.Double 78 =
  18. 18.Half of 112 =
  19. 19.Half of 142 =
  20. 20.Double 21 =
  21. 21.Half of 106 =
  22. 22.Double 93 =
  23. 23.Double 51 =
  24. 24.Double 34 =
  25. 25.Double 77 =
  26. 26.Half of 96 =
  27. 27.Double 83 =
  28. 28.Half of 192 =
  29. 29.Half of 86 =
  30. 30.Double 42 =
  31. 31.Double 44 =
  32. 32.Half of 102 =
  33. 33.Double 85 =
  34. 34.Double 58 =
  35. 35.Double 87 =
  36. 36.Double 84 =
  37. 37.Double 25 =
  38. 38.Double 66 =
  39. 39.Double 62 =
  40. 40.Half of 162 =

Answer key

  1. 64
  2. 178
  3. 188
  4. 41
  5. 176
  6. 182
  7. 47
  8. 17
  9. 142
  10. 162
  11. 6
  12. 96
  13. 76
  14. 106
  15. 192
  16. 9
  17. 156
  18. 56
  19. 71
  20. 42
  21. 53
  22. 186
  23. 102
  24. 68
  25. 154
  26. 48
  27. 166
  28. 96
  29. 43
  30. 84
  31. 88
  32. 51
  33. 170
  34. 116
  35. 174
  36. 168
  37. 50
  38. 132
  39. 124
  40. 81

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