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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 471 · 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 87 =
  2. 2.Double 47 =
  3. 3.Double 82 =
  4. 4.Half of 184 =
  5. 5.Half of 144 =
  6. 6.Double 46 =
  7. 7.Half of 54 =
  8. 8.Double 99 =
  9. 9.Half of 172 =
  10. 10.Half of 162 =
  11. 11.Half of 152 =
  12. 12.Double 63 =
  13. 13.Double 33 =
  14. 14.Half of 14 =
  15. 15.Double 84 =
  16. 16.Half of 88 =
  17. 17.Half of 176 =
  18. 18.Half of 142 =
  19. 19.Double 21 =
  20. 20.Half of 28 =
  21. 21.Double 71 =
  22. 22.Double 53 =
  23. 23.Half of 22 =
  24. 24.Double 42 =
  25. 25.Double 89 =
  26. 26.Double 64 =
  27. 27.Double 12 =
  28. 28.Half of 62 =
  29. 29.Double 61 =
  30. 30.Half of 12 =
  31. 31.Half of 68 =
  32. 32.Half of 104 =
  33. 33.Double 59 =
  34. 34.Half of 146 =
  35. 35.Half of 108 =
  36. 36.Half of 32 =
  37. 37.Double 25 =
  38. 38.Double 54 =
  39. 39.Double 58 =
  40. 40.Half of 16 =

Answer key

  1. 174
  2. 94
  3. 164
  4. 92
  5. 72
  6. 92
  7. 27
  8. 198
  9. 86
  10. 81
  11. 76
  12. 126
  13. 66
  14. 7
  15. 168
  16. 44
  17. 88
  18. 71
  19. 42
  20. 14
  21. 142
  22. 106
  23. 11
  24. 84
  25. 178
  26. 128
  27. 24
  28. 31
  29. 122
  30. 6
  31. 34
  32. 52
  33. 118
  34. 73
  35. 54
  36. 16
  37. 50
  38. 108
  39. 116
  40. 8

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