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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 569 · 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 42 =
  2. 2.Double 63 =
  3. 3.Half of 78 =
  4. 4.Half of 182 =
  5. 5.Half of 72 =
  6. 6.Double 15 =
  7. 7.Half of 122 =
  8. 8.Half of 74 =
  9. 9.Half of 132 =
  10. 10.Double 61 =
  11. 11.Double 89 =
  12. 12.Half of 194 =
  13. 13.Half of 58 =
  14. 14.Half of 76 =
  15. 15.Double 21 =
  16. 16.Double 96 =
  17. 17.Double 74 =
  18. 18.Half of 102 =
  19. 19.Double 49 =
  20. 20.Double 26 =
  21. 21.Half of 136 =
  22. 22.Double 94 =
  23. 23.Half of 174 =
  24. 24.Double 29 =
  25. 25.Double 39 =
  26. 26.Double 43 =
  27. 27.Double 91 =
  28. 28.Double 75 =
  29. 29.Half of 138 =
  30. 30.Double 52 =
  31. 31.Half of 144 =
  32. 32.Half of 54 =
  33. 33.Double 72 =
  34. 34.Half of 106 =
  35. 35.Half of 146 =
  36. 36.Half of 198 =
  37. 37.Double 51 =
  38. 38.Double 41 =
  39. 39.Double 81 =
  40. 40.Double 14 =

Answer key

  1. 21
  2. 126
  3. 39
  4. 91
  5. 36
  6. 30
  7. 61
  8. 37
  9. 66
  10. 122
  11. 178
  12. 97
  13. 29
  14. 38
  15. 42
  16. 192
  17. 148
  18. 51
  19. 98
  20. 52
  21. 68
  22. 188
  23. 87
  24. 58
  25. 78
  26. 86
  27. 182
  28. 150
  29. 69
  30. 104
  31. 72
  32. 27
  33. 144
  34. 53
  35. 73
  36. 99
  37. 102
  38. 82
  39. 162
  40. 28

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