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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 99 · 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 61 =
  2. 2.Half of 108 =
  3. 3.Half of 58 =
  4. 4.Double 15 =
  5. 5.Half of 16 =
  6. 6.Double 74 =
  7. 7.Half of 88 =
  8. 8.Double 45 =
  9. 9.Double 29 =
  10. 10.Double 68 =
  11. 11.Half of 146 =
  12. 12.Half of 68 =
  13. 13.Half of 106 =
  14. 14.Double 98 =
  15. 15.Double 54 =
  16. 16.Double 49 =
  17. 17.Half of 152 =
  18. 18.Double 85 =
  19. 19.Double 25 =
  20. 20.Half of 48 =
  21. 21.Double 86 =
  22. 22.Half of 32 =
  23. 23.Double 31 =
  24. 24.Double 67 =
  25. 25.Half of 46 =
  26. 26.Double 59 =
  27. 27.Half of 62 =
  28. 28.Half of 96 =
  29. 29.Half of 34 =
  30. 30.Double 91 =
  31. 31.Double 76 =
  32. 32.Half of 42 =
  33. 33.Half of 156 =
  34. 34.Double 82 =
  35. 35.Half of 18 =
  36. 36.Half of 22 =
  37. 37.Half of 122 =
  38. 38.Double 35 =
  39. 39.Double 33 =
  40. 40.Double 81 =

Answer key

  1. 122
  2. 54
  3. 29
  4. 30
  5. 8
  6. 148
  7. 44
  8. 90
  9. 58
  10. 136
  11. 73
  12. 34
  13. 53
  14. 196
  15. 108
  16. 98
  17. 76
  18. 170
  19. 50
  20. 24
  21. 172
  22. 16
  23. 62
  24. 134
  25. 23
  26. 118
  27. 31
  28. 48
  29. 17
  30. 182
  31. 152
  32. 21
  33. 78
  34. 164
  35. 9
  36. 11
  37. 61
  38. 70
  39. 66
  40. 162

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