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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 532 · 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 32 =
  2. 2.Double 65 =
  3. 3.Half of 118 =
  4. 4.Double 29 =
  5. 5.Half of 38 =
  6. 6.Double 64 =
  7. 7.Half of 32 =
  8. 8.Double 53 =
  9. 9.Half of 158 =
  10. 10.Double 34 =
  11. 11.Half of 86 =
  12. 12.Double 51 =
  13. 13.Double 19 =
  14. 14.Double 59 =
  15. 15.Half of 182 =
  16. 16.Double 68 =
  17. 17.Double 12 =
  18. 18.Double 96 =
  19. 19.Double 82 =
  20. 20.Double 97 =
  21. 21.Half of 108 =
  22. 22.Half of 48 =
  23. 23.Half of 172 =
  24. 24.Double 44 =
  25. 25.Double 31 =
  26. 26.Double 25 =
  27. 27.Double 24 =
  28. 28.Half of 36 =
  29. 29.Half of 22 =
  30. 30.Half of 12 =
  31. 31.Half of 162 =
  32. 32.Double 21 =
  33. 33.Double 79 =
  34. 34.Double 57 =
  35. 35.Double 71 =
  36. 36.Half of 168 =
  37. 37.Double 23 =
  38. 38.Double 33 =
  39. 39.Double 86 =
  40. 40.Double 63 =

Answer key

  1. 64
  2. 130
  3. 59
  4. 58
  5. 19
  6. 128
  7. 16
  8. 106
  9. 79
  10. 68
  11. 43
  12. 102
  13. 38
  14. 118
  15. 91
  16. 136
  17. 24
  18. 192
  19. 164
  20. 194
  21. 54
  22. 24
  23. 86
  24. 88
  25. 62
  26. 50
  27. 48
  28. 18
  29. 11
  30. 6
  31. 81
  32. 42
  33. 158
  34. 114
  35. 142
  36. 84
  37. 46
  38. 66
  39. 172
  40. 126

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