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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 32 · 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 54 =
  2. 2.Half of 142 =
  3. 3.Double 85 =
  4. 4.Double 21 =
  5. 5.Double 19 =
  6. 6.Half of 192 =
  7. 7.Half of 162 =
  8. 8.Double 18 =
  9. 9.Half of 122 =
  10. 10.Half of 198 =
  11. 11.Double 97 =
  12. 12.Double 29 =
  13. 13.Half of 132 =
  14. 14.Double 86 =
  15. 15.Double 94 =
  16. 16.Double 79 =
  17. 17.Double 22 =
  18. 18.Double 48 =
  19. 19.Double 71 =
  20. 20.Double 43 =
  21. 21.Double 58 =
  22. 22.Half of 46 =
  23. 23.Double 26 =
  24. 24.Half of 38 =
  25. 25.Half of 82 =
  26. 26.Double 23 =
  27. 27.Half of 146 =
  28. 28.Half of 22 =
  29. 29.Double 74 =
  30. 30.Half of 104 =
  31. 31.Half of 106 =
  32. 32.Half of 52 =
  33. 33.Double 31 =
  34. 34.Half of 194 =
  35. 35.Double 11 =
  36. 36.Double 35 =
  37. 37.Half of 152 =
  38. 38.Double 32 =
  39. 39.Double 99 =
  40. 40.Double 62 =

Answer key

  1. 108
  2. 71
  3. 170
  4. 42
  5. 38
  6. 96
  7. 81
  8. 36
  9. 61
  10. 99
  11. 194
  12. 58
  13. 66
  14. 172
  15. 188
  16. 158
  17. 44
  18. 96
  19. 142
  20. 86
  21. 116
  22. 23
  23. 52
  24. 19
  25. 41
  26. 46
  27. 73
  28. 11
  29. 148
  30. 52
  31. 53
  32. 26
  33. 62
  34. 97
  35. 22
  36. 70
  37. 76
  38. 64
  39. 198
  40. 124

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