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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 263 · 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 14 =
  2. 2.Half of 32 =
  3. 3.Half of 98 =
  4. 4.Half of 46 =
  5. 5.Double 98 =
  6. 6.Half of 48 =
  7. 7.Double 41 =
  8. 8.Double 85 =
  9. 9.Double 69 =
  10. 10.Half of 66 =
  11. 11.Double 21 =
  12. 12.Half of 172 =
  13. 13.Double 88 =
  14. 14.Double 71 =
  15. 15.Half of 38 =
  16. 16.Double 59 =
  17. 17.Double 68 =
  18. 18.Double 94 =
  19. 19.Half of 136 =
  20. 20.Double 61 =
  21. 21.Half of 184 =
  22. 22.Half of 112 =
  23. 23.Double 31 =
  24. 24.Double 63 =
  25. 25.Double 47 =
  26. 26.Double 12 =
  27. 27.Half of 82 =
  28. 28.Double 52 =
  29. 29.Half of 146 =
  30. 30.Double 55 =
  31. 31.Double 11 =
  32. 32.Double 87 =
  33. 33.Double 51 =
  34. 34.Double 84 =
  35. 35.Double 33 =
  36. 36.Half of 108 =
  37. 37.Half of 22 =
  38. 38.Half of 126 =
  39. 39.Half of 16 =
  40. 40.Double 34 =

Answer key

  1. 7
  2. 16
  3. 49
  4. 23
  5. 196
  6. 24
  7. 82
  8. 170
  9. 138
  10. 33
  11. 42
  12. 86
  13. 176
  14. 142
  15. 19
  16. 118
  17. 136
  18. 188
  19. 68
  20. 122
  21. 92
  22. 56
  23. 62
  24. 126
  25. 94
  26. 24
  27. 41
  28. 104
  29. 73
  30. 110
  31. 22
  32. 174
  33. 102
  34. 168
  35. 66
  36. 54
  37. 11
  38. 63
  39. 8
  40. 68

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