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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 414 · 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 51 =
  2. 2.Double 71 =
  3. 3.Half of 92 =
  4. 4.Double 37 =
  5. 5.Double 86 =
  6. 6.Double 58 =
  7. 7.Double 94 =
  8. 8.Double 19 =
  9. 9.Half of 46 =
  10. 10.Double 18 =
  11. 11.Half of 116 =
  12. 12.Half of 138 =
  13. 13.Double 41 =
  14. 14.Half of 36 =
  15. 15.Half of 18 =
  16. 16.Half of 188 =
  17. 17.Half of 126 =
  18. 18.Half of 34 =
  19. 19.Double 29 =
  20. 20.Double 14 =
  21. 21.Double 81 =
  22. 22.Double 53 =
  23. 23.Half of 192 =
  24. 24.Half of 102 =
  25. 25.Double 28 =
  26. 26.Half of 136 =
  27. 27.Double 23 =
  28. 28.Half of 168 =
  29. 29.Double 88 =
  30. 30.Double 59 =
  31. 31.Half of 154 =
  32. 32.Double 64 =
  33. 33.Half of 58 =
  34. 34.Double 62 =
  35. 35.Double 31 =
  36. 36.Double 45 =
  37. 37.Half of 42 =
  38. 38.Half of 56 =
  39. 39.Half of 84 =
  40. 40.Double 32 =

Answer key

  1. 102
  2. 142
  3. 46
  4. 74
  5. 172
  6. 116
  7. 188
  8. 38
  9. 23
  10. 36
  11. 58
  12. 69
  13. 82
  14. 18
  15. 9
  16. 94
  17. 63
  18. 17
  19. 58
  20. 28
  21. 162
  22. 106
  23. 96
  24. 51
  25. 56
  26. 68
  27. 46
  28. 84
  29. 176
  30. 118
  31. 77
  32. 128
  33. 29
  34. 124
  35. 62
  36. 90
  37. 21
  38. 28
  39. 42
  40. 64

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