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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 616 · 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 42 =
  2. 2.Half of 158 =
  3. 3.Double 54 =
  4. 4.Double 85 =
  5. 5.Half of 114 =
  6. 6.Half of 132 =
  7. 7.Double 42 =
  8. 8.Half of 122 =
  9. 9.Double 56 =
  10. 10.Half of 156 =
  11. 11.Double 74 =
  12. 12.Double 26 =
  13. 13.Double 96 =
  14. 14.Double 81 =
  15. 15.Double 21 =
  16. 16.Double 43 =
  17. 17.Half of 34 =
  18. 18.Half of 64 =
  19. 19.Half of 52 =
  20. 20.Double 46 =
  21. 21.Half of 18 =
  22. 22.Half of 88 =
  23. 23.Half of 142 =
  24. 24.Double 79 =
  25. 25.Double 61 =
  26. 26.Double 77 =
  27. 27.Half of 48 =
  28. 28.Half of 94 =
  29. 29.Double 27 =
  30. 30.Double 97 =
  31. 31.Double 59 =
  32. 32.Half of 124 =
  33. 33.Half of 86 =
  34. 34.Half of 168 =
  35. 35.Double 32 =
  36. 36.Double 34 =
  37. 37.Double 36 =
  38. 38.Half of 84 =
  39. 39.Double 62 =
  40. 40.Half of 194 =

Answer key

  1. 21
  2. 79
  3. 108
  4. 170
  5. 57
  6. 66
  7. 84
  8. 61
  9. 112
  10. 78
  11. 148
  12. 52
  13. 192
  14. 162
  15. 42
  16. 86
  17. 17
  18. 32
  19. 26
  20. 92
  21. 9
  22. 44
  23. 71
  24. 158
  25. 122
  26. 154
  27. 24
  28. 47
  29. 54
  30. 194
  31. 118
  32. 62
  33. 43
  34. 84
  35. 64
  36. 68
  37. 72
  38. 42
  39. 124
  40. 97

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