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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 321 · 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 89 =
  2. 2.Double 49 =
  3. 3.Double 94 =
  4. 4.Double 11 =
  5. 5.Half of 32 =
  6. 6.Half of 154 =
  7. 7.Double 47 =
  8. 8.Double 92 =
  9. 9.Half of 172 =
  10. 10.Half of 106 =
  11. 11.Half of 88 =
  12. 12.Double 33 =
  13. 13.Double 57 =
  14. 14.Double 73 =
  15. 15.Double 13 =
  16. 16.Half of 68 =
  17. 17.Double 32 =
  18. 18.Half of 62 =
  19. 19.Double 87 =
  20. 20.Half of 108 =
  21. 21.Half of 132 =
  22. 22.Double 81 =
  23. 23.Half of 26 =
  24. 24.Half of 18 =
  25. 25.Half of 12 =
  26. 26.Half of 52 =
  27. 27.Half of 152 =
  28. 28.Double 21 =
  29. 29.Half of 116 =
  30. 30.Half of 142 =
  31. 31.Half of 46 =
  32. 32.Half of 42 =
  33. 33.Half of 82 =
  34. 34.Double 91 =
  35. 35.Double 71 =
  36. 36.Double 78 =
  37. 37.Half of 136 =
  38. 38.Double 99 =
  39. 39.Double 98 =
  40. 40.Double 59 =

Answer key

  1. 178
  2. 98
  3. 188
  4. 22
  5. 16
  6. 77
  7. 94
  8. 184
  9. 86
  10. 53
  11. 44
  12. 66
  13. 114
  14. 146
  15. 26
  16. 34
  17. 64
  18. 31
  19. 174
  20. 54
  21. 66
  22. 162
  23. 13
  24. 9
  25. 6
  26. 26
  27. 76
  28. 42
  29. 58
  30. 71
  31. 23
  32. 21
  33. 41
  34. 182
  35. 142
  36. 156
  37. 68
  38. 198
  39. 196
  40. 118

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