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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 121 · 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 52 =
  2. 2.Double 87 =
  3. 3.Half of 104 =
  4. 4.Double 85 =
  5. 5.Double 14 =
  6. 6.Double 29 =
  7. 7.Double 75 =
  8. 8.Half of 166 =
  9. 9.Half of 82 =
  10. 10.Half of 98 =
  11. 11.Double 26 =
  12. 12.Half of 182 =
  13. 13.Double 39 =
  14. 14.Double 33 =
  15. 15.Half of 114 =
  16. 16.Half of 142 =
  17. 17.Double 19 =
  18. 18.Half of 42 =
  19. 19.Double 91 =
  20. 20.Double 81 =
  21. 21.Half of 106 =
  22. 22.Half of 12 =
  23. 23.Half of 192 =
  24. 24.Double 69 =
  25. 25.Half of 74 =
  26. 26.Double 59 =
  27. 27.Double 11 =
  28. 28.Double 35 =
  29. 29.Half of 62 =
  30. 30.Double 25 =
  31. 31.Double 55 =
  32. 32.Double 51 =
  33. 33.Half of 196 =
  34. 34.Double 66 =
  35. 35.Half of 188 =
  36. 36.Double 31 =
  37. 37.Half of 72 =
  38. 38.Half of 146 =
  39. 39.Half of 88 =
  40. 40.Half of 134 =

Answer key

  1. 26
  2. 174
  3. 52
  4. 170
  5. 28
  6. 58
  7. 150
  8. 83
  9. 41
  10. 49
  11. 52
  12. 91
  13. 78
  14. 66
  15. 57
  16. 71
  17. 38
  18. 21
  19. 182
  20. 162
  21. 53
  22. 6
  23. 96
  24. 138
  25. 37
  26. 118
  27. 22
  28. 70
  29. 31
  30. 50
  31. 110
  32. 102
  33. 98
  34. 132
  35. 94
  36. 62
  37. 36
  38. 73
  39. 44
  40. 67

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