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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 415 · 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 62 =
  2. 2.Half of 112 =
  3. 3.Half of 14 =
  4. 4.Double 73 =
  5. 5.Half of 138 =
  6. 6.Half of 126 =
  7. 7.Double 71 =
  8. 8.Double 44 =
  9. 9.Double 98 =
  10. 10.Double 29 =
  11. 11.Half of 152 =
  12. 12.Double 13 =
  13. 13.Double 65 =
  14. 14.Half of 114 =
  15. 15.Double 51 =
  16. 16.Half of 116 =
  17. 17.Half of 88 =
  18. 18.Double 48 =
  19. 19.Double 46 =
  20. 20.Double 93 =
  21. 21.Double 21 =
  22. 22.Half of 196 =
  23. 23.Half of 102 =
  24. 24.Double 41 =
  25. 25.Half of 34 =
  26. 26.Double 27 =
  27. 27.Half of 106 =
  28. 28.Double 88 =
  29. 29.Double 17 =
  30. 30.Half of 16 =
  31. 31.Double 77 =
  32. 32.Double 34 =
  33. 33.Double 52 =
  34. 34.Double 11 =
  35. 35.Double 58 =
  36. 36.Half of 66 =
  37. 37.Double 28 =
  38. 38.Double 49 =
  39. 39.Half of 148 =
  40. 40.Double 81 =

Answer key

  1. 31
  2. 56
  3. 7
  4. 146
  5. 69
  6. 63
  7. 142
  8. 88
  9. 196
  10. 58
  11. 76
  12. 26
  13. 130
  14. 57
  15. 102
  16. 58
  17. 44
  18. 96
  19. 92
  20. 186
  21. 42
  22. 98
  23. 51
  24. 82
  25. 17
  26. 54
  27. 53
  28. 176
  29. 34
  30. 8
  31. 154
  32. 68
  33. 104
  34. 22
  35. 116
  36. 33
  37. 56
  38. 98
  39. 74
  40. 162

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