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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 149 · 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 48 =
  2. 2.Half of 82 =
  3. 3.Double 67 =
  4. 4.Double 46 =
  5. 5.Double 37 =
  6. 6.Double 77 =
  7. 7.Half of 162 =
  8. 8.Half of 66 =
  9. 9.Half of 172 =
  10. 10.Half of 64 =
  11. 11.Half of 62 =
  12. 12.Double 15 =
  13. 13.Double 81 =
  14. 14.Double 32 =
  15. 15.Half of 118 =
  16. 16.Half of 52 =
  17. 17.Half of 136 =
  18. 18.Double 91 =
  19. 19.Half of 122 =
  20. 20.Double 57 =
  21. 21.Double 51 =
  22. 22.Half of 192 =
  23. 23.Half of 102 =
  24. 24.Double 99 =
  25. 25.Half of 44 =
  26. 26.Double 34 =
  27. 27.Half of 98 =
  28. 28.Double 74 =
  29. 29.Double 56 =
  30. 30.Double 11 =
  31. 31.Double 86 =
  32. 32.Half of 34 =
  33. 33.Half of 132 =
  34. 34.Double 31 =
  35. 35.Half of 138 =
  36. 36.Double 95 =
  37. 37.Double 75 =
  38. 38.Double 71 =
  39. 39.Half of 48 =
  40. 40.Half of 88 =

Answer key

  1. 96
  2. 41
  3. 134
  4. 92
  5. 74
  6. 154
  7. 81
  8. 33
  9. 86
  10. 32
  11. 31
  12. 30
  13. 162
  14. 64
  15. 59
  16. 26
  17. 68
  18. 182
  19. 61
  20. 114
  21. 102
  22. 96
  23. 51
  24. 198
  25. 22
  26. 68
  27. 49
  28. 148
  29. 112
  30. 22
  31. 172
  32. 17
  33. 66
  34. 62
  35. 69
  36. 190
  37. 150
  38. 142
  39. 24
  40. 44

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