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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 71 · 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 39 =
  2. 2.Double 67 =
  3. 3.Half of 166 =
  4. 4.Half of 146 =
  5. 5.Double 47 =
  6. 6.Double 32 =
  7. 7.Half of 152 =
  8. 8.Half of 46 =
  9. 9.Half of 188 =
  10. 10.Half of 138 =
  11. 11.Half of 182 =
  12. 12.Double 93 =
  13. 13.Half of 162 =
  14. 14.Half of 98 =
  15. 15.Half of 42 =
  16. 16.Double 28 =
  17. 17.Double 11 =
  18. 18.Half of 94 =
  19. 19.Half of 184 =
  20. 20.Double 21 =
  21. 21.Double 96 =
  22. 22.Half of 72 =
  23. 23.Double 57 =
  24. 24.Half of 48 =
  25. 25.Double 41 =
  26. 26.Double 23 =
  27. 27.Double 92 =
  28. 28.Half of 52 =
  29. 29.Double 35 =
  30. 30.Half of 136 =
  31. 31.Half of 124 =
  32. 32.Half of 114 =
  33. 33.Double 55 =
  34. 34.Double 64 =
  35. 35.Double 19 =
  36. 36.Half of 32 =
  37. 37.Half of 186 =
  38. 38.Half of 156 =
  39. 39.Double 26 =
  40. 40.Half of 38 =

Answer key

  1. 78
  2. 134
  3. 83
  4. 73
  5. 94
  6. 64
  7. 76
  8. 23
  9. 94
  10. 69
  11. 91
  12. 186
  13. 81
  14. 49
  15. 21
  16. 56
  17. 22
  18. 47
  19. 92
  20. 42
  21. 192
  22. 36
  23. 114
  24. 24
  25. 82
  26. 46
  27. 184
  28. 26
  29. 70
  30. 68
  31. 62
  32. 57
  33. 110
  34. 128
  35. 38
  36. 16
  37. 93
  38. 78
  39. 52
  40. 19

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