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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 451 · 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 62 =
  2. 2.Half of 22 =
  3. 3.Half of 18 =
  4. 4.Double 63 =
  5. 5.Double 38 =
  6. 6.Double 72 =
  7. 7.Double 88 =
  8. 8.Double 14 =
  9. 9.Double 77 =
  10. 10.Half of 92 =
  11. 11.Half of 188 =
  12. 12.Half of 42 =
  13. 13.Double 21 =
  14. 14.Half of 64 =
  15. 15.Double 76 =
  16. 16.Double 29 =
  17. 17.Double 23 =
  18. 18.Half of 164 =
  19. 19.Half of 162 =
  20. 20.Double 79 =
  21. 21.Half of 78 =
  22. 22.Double 94 =
  23. 23.Double 61 =
  24. 24.Half of 12 =
  25. 25.Double 31 =
  26. 26.Half of 82 =
  27. 27.Half of 56 =
  28. 28.Double 71 =
  29. 29.Half of 126 =
  30. 30.Half of 172 =
  31. 31.Half of 14 =
  32. 32.Half of 176 =
  33. 33.Double 44 =
  34. 34.Double 25 =
  35. 35.Double 41 =
  36. 36.Double 33 =
  37. 37.Double 75 =
  38. 38.Double 34 =
  39. 39.Half of 122 =
  40. 40.Double 36 =

Answer key

  1. 31
  2. 11
  3. 9
  4. 126
  5. 76
  6. 144
  7. 176
  8. 28
  9. 154
  10. 46
  11. 94
  12. 21
  13. 42
  14. 32
  15. 152
  16. 58
  17. 46
  18. 82
  19. 81
  20. 158
  21. 39
  22. 188
  23. 122
  24. 6
  25. 62
  26. 41
  27. 28
  28. 142
  29. 63
  30. 86
  31. 7
  32. 88
  33. 88
  34. 50
  35. 82
  36. 66
  37. 150
  38. 68
  39. 61
  40. 72

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