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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 222 · 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 122 =
  2. 2.Double 93 =
  3. 3.Half of 86 =
  4. 4.Double 33 =
  5. 5.Half of 104 =
  6. 6.Half of 132 =
  7. 7.Half of 48 =
  8. 8.Half of 74 =
  9. 9.Double 12 =
  10. 10.Half of 172 =
  11. 11.Half of 136 =
  12. 12.Double 54 =
  13. 13.Half of 176 =
  14. 14.Half of 192 =
  15. 15.Double 31 =
  16. 16.Half of 54 =
  17. 17.Double 13 =
  18. 18.Double 66 =
  19. 19.Double 34 =
  20. 20.Double 21 =
  21. 21.Double 59 =
  22. 22.Half of 46 =
  23. 23.Half of 106 =
  24. 24.Double 63 =
  25. 25.Half of 146 =
  26. 26.Double 79 =
  27. 27.Double 88 =
  28. 28.Double 48 =
  29. 29.Half of 168 =
  30. 30.Half of 78 =
  31. 31.Double 71 =
  32. 32.Double 44 =
  33. 33.Half of 152 =
  34. 34.Half of 42 =
  35. 35.Double 84 =
  36. 36.Half of 186 =
  37. 37.Double 61 =
  38. 38.Half of 112 =
  39. 39.Double 97 =
  40. 40.Half of 22 =

Answer key

  1. 61
  2. 186
  3. 43
  4. 66
  5. 52
  6. 66
  7. 24
  8. 37
  9. 24
  10. 86
  11. 68
  12. 108
  13. 88
  14. 96
  15. 62
  16. 27
  17. 26
  18. 132
  19. 68
  20. 42
  21. 118
  22. 23
  23. 53
  24. 126
  25. 73
  26. 158
  27. 176
  28. 96
  29. 84
  30. 39
  31. 142
  32. 88
  33. 76
  34. 21
  35. 168
  36. 93
  37. 122
  38. 56
  39. 194
  40. 11

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