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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 792 · 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 23 =
  2. 2.Double 27 =
  3. 3.Double 61 =
  4. 4.Double 21 =
  5. 5.Half of 28 =
  6. 6.Double 43 =
  7. 7.Half of 64 =
  8. 8.Double 29 =
  9. 9.Half of 112 =
  10. 10.Double 68 =
  11. 11.Double 78 =
  12. 12.Double 57 =
  13. 13.Double 89 =
  14. 14.Double 64 =
  15. 15.Double 58 =
  16. 16.Half of 132 =
  17. 17.Half of 176 =
  18. 18.Double 52 =
  19. 19.Double 34 =
  20. 20.Double 18 =
  21. 21.Half of 78 =
  22. 22.Double 87 =
  23. 23.Half of 58 =
  24. 24.Double 69 =
  25. 25.Half of 46 =
  26. 26.Double 33 =
  27. 27.Half of 192 =
  28. 28.Half of 74 =
  29. 29.Double 93 =
  30. 30.Double 41 =
  31. 31.Half of 136 =
  32. 32.Double 31 =
  33. 33.Double 63 =
  34. 34.Double 47 =
  35. 35.Double 14 =
  36. 36.Double 55 =
  37. 37.Double 54 =
  38. 38.Double 83 =
  39. 39.Half of 178 =
  40. 40.Double 22 =

Answer key

  1. 46
  2. 54
  3. 122
  4. 42
  5. 14
  6. 86
  7. 32
  8. 58
  9. 56
  10. 136
  11. 156
  12. 114
  13. 178
  14. 128
  15. 116
  16. 66
  17. 88
  18. 104
  19. 68
  20. 36
  21. 39
  22. 174
  23. 29
  24. 138
  25. 23
  26. 66
  27. 96
  28. 37
  29. 186
  30. 82
  31. 68
  32. 62
  33. 126
  34. 94
  35. 28
  36. 110
  37. 108
  38. 166
  39. 89
  40. 44

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