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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 583 · 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 102 =
  2. 2.Half of 38 =
  3. 3.Double 32 =
  4. 4.Double 21 =
  5. 5.Half of 86 =
  6. 6.Half of 24 =
  7. 7.Half of 92 =
  8. 8.Half of 116 =
  9. 9.Double 14 =
  10. 10.Half of 74 =
  11. 11.Double 75 =
  12. 12.Double 47 =
  13. 13.Half of 106 =
  14. 14.Half of 44 =
  15. 15.Double 23 =
  16. 16.Half of 146 =
  17. 17.Half of 46 =
  18. 18.Half of 142 =
  19. 19.Half of 182 =
  20. 20.Half of 32 =
  21. 21.Double 29 =
  22. 22.Half of 104 =
  23. 23.Double 67 =
  24. 24.Half of 52 =
  25. 25.Half of 108 =
  26. 26.Half of 62 =
  27. 27.Double 81 =
  28. 28.Half of 72 =
  29. 29.Double 26 =
  30. 30.Double 12 =
  31. 31.Double 34 =
  32. 32.Double 31 =
  33. 33.Double 36 =
  34. 34.Half of 132 =
  35. 35.Double 43 =
  36. 36.Half of 154 =
  37. 37.Half of 158 =
  38. 38.Double 57 =
  39. 39.Double 96 =
  40. 40.Double 99 =

Answer key

  1. 51
  2. 19
  3. 64
  4. 42
  5. 43
  6. 12
  7. 46
  8. 58
  9. 28
  10. 37
  11. 150
  12. 94
  13. 53
  14. 22
  15. 46
  16. 73
  17. 23
  18. 71
  19. 91
  20. 16
  21. 58
  22. 52
  23. 134
  24. 26
  25. 54
  26. 31
  27. 162
  28. 36
  29. 52
  30. 24
  31. 68
  32. 62
  33. 72
  34. 66
  35. 86
  36. 77
  37. 79
  38. 114
  39. 192
  40. 198

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