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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 233 · 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 66 =
  2. 2.Half of 22 =
  3. 3.Double 26 =
  4. 4.Double 63 =
  5. 5.Half of 68 =
  6. 6.Double 84 =
  7. 7.Double 44 =
  8. 8.Double 98 =
  9. 9.Half of 36 =
  10. 10.Double 97 =
  11. 11.Double 25 =
  12. 12.Half of 64 =
  13. 13.Double 23 =
  14. 14.Double 47 =
  15. 15.Double 31 =
  16. 16.Half of 186 =
  17. 17.Double 83 =
  18. 18.Double 61 =
  19. 19.Double 19 =
  20. 20.Half of 172 =
  21. 21.Double 64 =
  22. 22.Half of 42 =
  23. 23.Double 76 =
  24. 24.Double 82 =
  25. 25.Double 27 =
  26. 26.Double 21 =
  27. 27.Double 46 =
  28. 28.Half of 26 =
  29. 29.Double 12 =
  30. 30.Double 71 =
  31. 31.Double 53 =
  32. 32.Half of 114 =
  33. 33.Double 85 =
  34. 34.Double 16 =
  35. 35.Half of 112 =
  36. 36.Double 57 =
  37. 37.Double 14 =
  38. 38.Double 99 =
  39. 39.Half of 182 =
  40. 40.Double 52 =

Answer key

  1. 33
  2. 11
  3. 52
  4. 126
  5. 34
  6. 168
  7. 88
  8. 196
  9. 18
  10. 194
  11. 50
  12. 32
  13. 46
  14. 94
  15. 62
  16. 93
  17. 166
  18. 122
  19. 38
  20. 86
  21. 128
  22. 21
  23. 152
  24. 164
  25. 54
  26. 42
  27. 92
  28. 13
  29. 24
  30. 142
  31. 106
  32. 57
  33. 170
  34. 32
  35. 56
  36. 114
  37. 28
  38. 198
  39. 91
  40. 104

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