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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 687 · 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 154 =
  2. 2.Double 89 =
  3. 3.Double 24 =
  4. 4.Half of 134 =
  5. 5.Half of 28 =
  6. 6.Half of 42 =
  7. 7.Half of 164 =
  8. 8.Double 38 =
  9. 9.Half of 72 =
  10. 10.Half of 198 =
  11. 11.Double 64 =
  12. 12.Half of 14 =
  13. 13.Double 27 =
  14. 14.Half of 76 =
  15. 15.Double 44 =
  16. 16.Double 15 =
  17. 17.Double 31 =
  18. 18.Half of 132 =
  19. 19.Double 19 =
  20. 20.Half of 142 =
  21. 21.Half of 12 =
  22. 22.Half of 24 =
  23. 23.Double 84 =
  24. 24.Double 73 =
  25. 25.Half of 162 =
  26. 26.Half of 112 =
  27. 27.Double 71 =
  28. 28.Half of 18 =
  29. 29.Double 36 =
  30. 30.Half of 136 =
  31. 31.Double 98 =
  32. 32.Double 75 =
  33. 33.Half of 46 =
  34. 34.Half of 86 =
  35. 35.Double 65 =
  36. 36.Double 39 =
  37. 37.Half of 122 =
  38. 38.Double 57 =
  39. 39.Double 77 =
  40. 40.Double 33 =

Answer key

  1. 77
  2. 178
  3. 48
  4. 67
  5. 14
  6. 21
  7. 82
  8. 76
  9. 36
  10. 99
  11. 128
  12. 7
  13. 54
  14. 38
  15. 88
  16. 30
  17. 62
  18. 66
  19. 38
  20. 71
  21. 6
  22. 12
  23. 168
  24. 146
  25. 81
  26. 56
  27. 142
  28. 9
  29. 72
  30. 68
  31. 196
  32. 150
  33. 23
  34. 43
  35. 130
  36. 78
  37. 61
  38. 114
  39. 154
  40. 66

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