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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 101 · 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 41 =
  2. 2.Half of 56 =
  3. 3.Double 32 =
  4. 4.Half of 138 =
  5. 5.Double 72 =
  6. 6.Half of 32 =
  7. 7.Half of 136 =
  8. 8.Double 43 =
  9. 9.Double 52 =
  10. 10.Double 77 =
  11. 11.Double 11 =
  12. 12.Double 15 =
  13. 13.Half of 76 =
  14. 14.Double 33 =
  15. 15.Double 85 =
  16. 16.Half of 36 =
  17. 17.Double 62 =
  18. 18.Half of 16 =
  19. 19.Double 55 =
  20. 20.Half of 22 =
  21. 21.Double 24 =
  22. 22.Half of 52 =
  23. 23.Double 87 =
  24. 24.Half of 82 =
  25. 25.Half of 96 =
  26. 26.Half of 164 =
  27. 27.Half of 166 =
  28. 28.Half of 114 =
  29. 29.Double 16 =
  30. 30.Double 86 =
  31. 31.Half of 86 =
  32. 32.Half of 192 =
  33. 33.Double 63 =
  34. 34.Double 81 =
  35. 35.Double 34 =
  36. 36.Double 25 =
  37. 37.Double 91 =
  38. 38.Double 56 =
  39. 39.Double 27 =
  40. 40.Half of 18 =

Answer key

  1. 82
  2. 28
  3. 64
  4. 69
  5. 144
  6. 16
  7. 68
  8. 86
  9. 104
  10. 154
  11. 22
  12. 30
  13. 38
  14. 66
  15. 170
  16. 18
  17. 124
  18. 8
  19. 110
  20. 11
  21. 48
  22. 26
  23. 174
  24. 41
  25. 48
  26. 82
  27. 83
  28. 57
  29. 32
  30. 172
  31. 43
  32. 96
  33. 126
  34. 162
  35. 68
  36. 50
  37. 182
  38. 112
  39. 54
  40. 9

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