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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 519 · 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 43 =
  2. 2.Double 57 =
  3. 3.Double 99 =
  4. 4.Double 84 =
  5. 5.Half of 34 =
  6. 6.Half of 172 =
  7. 7.Double 51 =
  8. 8.Double 12 =
  9. 9.Double 93 =
  10. 10.Half of 46 =
  11. 11.Half of 48 =
  12. 12.Half of 122 =
  13. 13.Half of 12 =
  14. 14.Half of 104 =
  15. 15.Half of 162 =
  16. 16.Half of 124 =
  17. 17.Double 89 =
  18. 18.Half of 176 =
  19. 19.Double 53 =
  20. 20.Half of 174 =
  21. 21.Double 81 =
  22. 22.Double 69 =
  23. 23.Half of 28 =
  24. 24.Double 32 =
  25. 25.Half of 42 =
  26. 26.Double 46 =
  27. 27.Double 59 =
  28. 28.Double 74 =
  29. 29.Double 41 =
  30. 30.Half of 92 =
  31. 31.Half of 14 =
  32. 32.Double 72 =
  33. 33.Double 56 =
  34. 34.Half of 68 =
  35. 35.Double 95 =
  36. 36.Double 91 =
  37. 37.Half of 62 =
  38. 38.Double 58 =
  39. 39.Half of 118 =
  40. 40.Double 82 =

Answer key

  1. 86
  2. 114
  3. 198
  4. 168
  5. 17
  6. 86
  7. 102
  8. 24
  9. 186
  10. 23
  11. 24
  12. 61
  13. 6
  14. 52
  15. 81
  16. 62
  17. 178
  18. 88
  19. 106
  20. 87
  21. 162
  22. 138
  23. 14
  24. 64
  25. 21
  26. 92
  27. 118
  28. 148
  29. 82
  30. 46
  31. 7
  32. 144
  33. 112
  34. 34
  35. 190
  36. 182
  37. 31
  38. 116
  39. 59
  40. 164

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