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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 454 · 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 85 =
  2. 2.Half of 92 =
  3. 3.Double 61 =
  4. 4.Half of 178 =
  5. 5.Half of 48 =
  6. 6.Double 97 =
  7. 7.Double 27 =
  8. 8.Half of 122 =
  9. 9.Double 19 =
  10. 10.Double 77 =
  11. 11.Half of 46 =
  12. 12.Double 41 =
  13. 13.Double 21 =
  14. 14.Double 91 =
  15. 15.Half of 104 =
  16. 16.Double 67 =
  17. 17.Double 96 =
  18. 18.Half of 16 =
  19. 19.Double 92 =
  20. 20.Double 81 =
  21. 21.Double 83 =
  22. 22.Double 51 =
  23. 23.Double 23 =
  24. 24.Double 53 =
  25. 25.Half of 176 =
  26. 26.Half of 106 =
  27. 27.Double 89 =
  28. 28.Double 28 =
  29. 29.Half of 112 =
  30. 30.Double 26 =
  31. 31.Half of 26 =
  32. 32.Half of 54 =
  33. 33.Half of 128 =
  34. 34.Half of 52 =
  35. 35.Double 62 =
  36. 36.Half of 102 =
  37. 37.Double 56 =
  38. 38.Double 57 =
  39. 39.Double 29 =
  40. 40.Double 54 =

Answer key

  1. 170
  2. 46
  3. 122
  4. 89
  5. 24
  6. 194
  7. 54
  8. 61
  9. 38
  10. 154
  11. 23
  12. 82
  13. 42
  14. 182
  15. 52
  16. 134
  17. 192
  18. 8
  19. 184
  20. 162
  21. 166
  22. 102
  23. 46
  24. 106
  25. 88
  26. 53
  27. 178
  28. 56
  29. 56
  30. 52
  31. 13
  32. 27
  33. 64
  34. 26
  35. 124
  36. 51
  37. 112
  38. 114
  39. 58
  40. 108

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