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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 245 · 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 82 =
  2. 2.Double 59 =
  3. 3.Double 25 =
  4. 4.Double 63 =
  5. 5.Half of 198 =
  6. 6.Double 92 =
  7. 7.Double 42 =
  8. 8.Double 15 =
  9. 9.Half of 76 =
  10. 10.Double 97 =
  11. 11.Double 69 =
  12. 12.Half of 26 =
  13. 13.Double 18 =
  14. 14.Half of 112 =
  15. 15.Double 85 =
  16. 16.Double 94 =
  17. 17.Half of 52 =
  18. 18.Double 83 =
  19. 19.Half of 106 =
  20. 20.Double 53 =
  21. 21.Half of 128 =
  22. 22.Half of 12 =
  23. 23.Half of 174 =
  24. 24.Half of 164 =
  25. 25.Half of 176 =
  26. 26.Double 61 =
  27. 27.Double 38 =
  28. 28.Double 39 =
  29. 29.Half of 124 =
  30. 30.Half of 134 =
  31. 31.Half of 46 =
  32. 32.Half of 152 =
  33. 33.Half of 56 =
  34. 34.Double 37 =
  35. 35.Double 74 =
  36. 36.Half of 114 =
  37. 37.Double 78 =
  38. 38.Double 14 =
  39. 39.Half of 72 =
  40. 40.Double 91 =

Answer key

  1. 164
  2. 118
  3. 50
  4. 126
  5. 99
  6. 184
  7. 84
  8. 30
  9. 38
  10. 194
  11. 138
  12. 13
  13. 36
  14. 56
  15. 170
  16. 188
  17. 26
  18. 166
  19. 53
  20. 106
  21. 64
  22. 6
  23. 87
  24. 82
  25. 88
  26. 122
  27. 76
  28. 78
  29. 62
  30. 67
  31. 23
  32. 76
  33. 28
  34. 74
  35. 148
  36. 57
  37. 156
  38. 28
  39. 36
  40. 182

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