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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 631 · 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 142 =
  2. 2.Double 41 =
  3. 3.Half of 154 =
  4. 4.Double 17 =
  5. 5.Half of 162 =
  6. 6.Double 91 =
  7. 7.Double 44 =
  8. 8.Double 69 =
  9. 9.Double 68 =
  10. 10.Half of 62 =
  11. 11.Half of 196 =
  12. 12.Double 79 =
  13. 13.Double 32 =
  14. 14.Half of 102 =
  15. 15.Half of 12 =
  16. 16.Double 33 =
  17. 17.Half of 118 =
  18. 18.Double 29 =
  19. 19.Double 42 =
  20. 20.Half of 174 =
  21. 21.Half of 128 =
  22. 22.Double 55 =
  23. 23.Double 71 =
  24. 24.Half of 82 =
  25. 25.Half of 198 =
  26. 26.Double 76 =
  27. 27.Half of 32 =
  28. 28.Half of 72 =
  29. 29.Half of 172 =
  30. 30.Half of 36 =
  31. 31.Double 13 =
  32. 32.Half of 76 =
  33. 33.Double 49 =
  34. 34.Double 62 =
  35. 35.Half of 78 =
  36. 36.Double 73 =
  37. 37.Half of 64 =
  38. 38.Double 57 =
  39. 39.Double 61 =
  40. 40.Double 89 =

Answer key

  1. 71
  2. 82
  3. 77
  4. 34
  5. 81
  6. 182
  7. 88
  8. 138
  9. 136
  10. 31
  11. 98
  12. 158
  13. 64
  14. 51
  15. 6
  16. 66
  17. 59
  18. 58
  19. 84
  20. 87
  21. 64
  22. 110
  23. 142
  24. 41
  25. 99
  26. 152
  27. 16
  28. 36
  29. 86
  30. 18
  31. 26
  32. 38
  33. 98
  34. 124
  35. 39
  36. 146
  37. 32
  38. 114
  39. 122
  40. 178

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