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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 401 · 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 31 =
  2. 2.Double 21 =
  3. 3.Half of 78 =
  4. 4.Half of 182 =
  5. 5.Half of 176 =
  6. 6.Double 78 =
  7. 7.Half of 154 =
  8. 8.Double 99 =
  9. 9.Half of 146 =
  10. 10.Half of 68 =
  11. 11.Double 36 =
  12. 12.Half of 144 =
  13. 13.Half of 38 =
  14. 14.Double 56 =
  15. 15.Half of 64 =
  16. 16.Half of 124 =
  17. 17.Half of 76 =
  18. 18.Double 28 =
  19. 19.Double 52 =
  20. 20.Half of 54 =
  21. 21.Half of 162 =
  22. 22.Half of 22 =
  23. 23.Half of 44 =
  24. 24.Half of 66 =
  25. 25.Double 83 =
  26. 26.Double 91 =
  27. 27.Double 25 =
  28. 28.Half of 126 =
  29. 29.Double 61 =
  30. 30.Half of 172 =
  31. 31.Double 75 =
  32. 32.Half of 34 =
  33. 33.Double 71 =
  34. 34.Half of 46 =
  35. 35.Half of 58 =
  36. 36.Half of 138 =
  37. 37.Double 53 =
  38. 38.Half of 52 =
  39. 39.Half of 48 =
  40. 40.Half of 104 =

Answer key

  1. 62
  2. 42
  3. 39
  4. 91
  5. 88
  6. 156
  7. 77
  8. 198
  9. 73
  10. 34
  11. 72
  12. 72
  13. 19
  14. 112
  15. 32
  16. 62
  17. 38
  18. 56
  19. 104
  20. 27
  21. 81
  22. 11
  23. 22
  24. 33
  25. 166
  26. 182
  27. 50
  28. 63
  29. 122
  30. 86
  31. 150
  32. 17
  33. 142
  34. 23
  35. 29
  36. 69
  37. 106
  38. 26
  39. 24
  40. 52

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