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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 406 · 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 16 =
  2. 2.Double 23 =
  3. 3.Half of 96 =
  4. 4.Double 59 =
  5. 5.Half of 166 =
  6. 6.Double 41 =
  7. 7.Double 71 =
  8. 8.Double 87 =
  9. 9.Half of 112 =
  10. 10.Double 42 =
  11. 11.Double 63 =
  12. 12.Double 55 =
  13. 13.Double 21 =
  14. 14.Half of 14 =
  15. 15.Double 33 =
  16. 16.Half of 116 =
  17. 17.Double 32 =
  18. 18.Double 22 =
  19. 19.Half of 58 =
  20. 20.Double 88 =
  21. 21.Double 18 =
  22. 22.Double 91 =
  23. 23.Half of 102 =
  24. 24.Half of 22 =
  25. 25.Half of 158 =
  26. 26.Double 31 =
  27. 27.Half of 162 =
  28. 28.Double 27 =
  29. 29.Half of 172 =
  30. 30.Double 43 =
  31. 31.Half of 52 =
  32. 32.Half of 62 =
  33. 33.Half of 34 =
  34. 34.Half of 144 =
  35. 35.Half of 184 =
  36. 36.Double 79 =
  37. 37.Half of 18 =
  38. 38.Double 47 =
  39. 39.Half of 182 =
  40. 40.Half of 152 =

Answer key

  1. 32
  2. 46
  3. 48
  4. 118
  5. 83
  6. 82
  7. 142
  8. 174
  9. 56
  10. 84
  11. 126
  12. 110
  13. 42
  14. 7
  15. 66
  16. 58
  17. 64
  18. 44
  19. 29
  20. 176
  21. 36
  22. 182
  23. 51
  24. 11
  25. 79
  26. 62
  27. 81
  28. 54
  29. 86
  30. 86
  31. 26
  32. 31
  33. 17
  34. 72
  35. 92
  36. 158
  37. 9
  38. 94
  39. 91
  40. 76

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