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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 574 · 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 34 =
  2. 2.Double 81 =
  3. 3.Double 15 =
  4. 4.Half of 194 =
  5. 5.Double 59 =
  6. 6.Half of 42 =
  7. 7.Double 37 =
  8. 8.Double 32 =
  9. 9.Double 86 =
  10. 10.Half of 128 =
  11. 11.Double 73 =
  12. 12.Double 44 =
  13. 13.Double 83 =
  14. 14.Double 38 =
  15. 15.Double 97 =
  16. 16.Half of 24 =
  17. 17.Double 92 =
  18. 18.Half of 16 =
  19. 19.Double 71 =
  20. 20.Double 91 =
  21. 21.Double 17 =
  22. 22.Double 61 =
  23. 23.Half of 162 =
  24. 24.Double 35 =
  25. 25.Half of 198 =
  26. 26.Double 19 =
  27. 27.Half of 116 =
  28. 28.Half of 142 =
  29. 29.Double 49 =
  30. 30.Double 23 =
  31. 31.Double 55 =
  32. 32.Half of 94 =
  33. 33.Half of 92 =
  34. 34.Double 26 =
  35. 35.Half of 14 =
  36. 36.Double 79 =
  37. 37.Half of 82 =
  38. 38.Half of 182 =
  39. 39.Double 58 =
  40. 40.Double 43 =

Answer key

  1. 68
  2. 162
  3. 30
  4. 97
  5. 118
  6. 21
  7. 74
  8. 64
  9. 172
  10. 64
  11. 146
  12. 88
  13. 166
  14. 76
  15. 194
  16. 12
  17. 184
  18. 8
  19. 142
  20. 182
  21. 34
  22. 122
  23. 81
  24. 70
  25. 99
  26. 38
  27. 58
  28. 71
  29. 98
  30. 46
  31. 110
  32. 47
  33. 46
  34. 52
  35. 7
  36. 158
  37. 41
  38. 91
  39. 116
  40. 86

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