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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 517 · 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 67 =
  2. 2.Double 34 =
  3. 3.Double 84 =
  4. 4.Double 23 =
  5. 5.Double 58 =
  6. 6.Half of 162 =
  7. 7.Half of 106 =
  8. 8.Double 13 =
  9. 9.Half of 136 =
  10. 10.Double 82 =
  11. 11.Double 49 =
  12. 12.Half of 182 =
  13. 13.Double 85 =
  14. 14.Double 15 =
  15. 15.Half of 104 =
  16. 16.Double 53 =
  17. 17.Double 79 =
  18. 18.Half of 82 =
  19. 19.Half of 142 =
  20. 20.Double 26 =
  21. 21.Double 65 =
  22. 22.Double 31 =
  23. 23.Double 32 =
  24. 24.Half of 172 =
  25. 25.Double 78 =
  26. 26.Half of 158 =
  27. 27.Double 61 =
  28. 28.Double 25 =
  29. 29.Double 62 =
  30. 30.Double 93 =
  31. 31.Half of 38 =
  32. 32.Double 28 =
  33. 33.Half of 42 =
  34. 34.Double 76 =
  35. 35.Double 57 =
  36. 36.Double 74 =
  37. 37.Double 35 =
  38. 38.Half of 146 =
  39. 39.Half of 94 =
  40. 40.Half of 48 =

Answer key

  1. 134
  2. 68
  3. 168
  4. 46
  5. 116
  6. 81
  7. 53
  8. 26
  9. 68
  10. 164
  11. 98
  12. 91
  13. 170
  14. 30
  15. 52
  16. 106
  17. 158
  18. 41
  19. 71
  20. 52
  21. 130
  22. 62
  23. 64
  24. 86
  25. 156
  26. 79
  27. 122
  28. 50
  29. 124
  30. 186
  31. 19
  32. 56
  33. 21
  34. 152
  35. 114
  36. 148
  37. 70
  38. 73
  39. 47
  40. 24

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