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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 236 · 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 93 =
  2. 2.Double 63 =
  3. 3.Double 61 =
  4. 4.Double 57 =
  5. 5.Double 22 =
  6. 6.Double 84 =
  7. 7.Double 44 =
  8. 8.Double 11 =
  9. 9.Half of 32 =
  10. 10.Double 92 =
  11. 11.Double 33 =
  12. 12.Double 16 =
  13. 13.Half of 86 =
  14. 14.Half of 42 =
  15. 15.Half of 188 =
  16. 16.Double 26 =
  17. 17.Double 82 =
  18. 18.Double 23 =
  19. 19.Half of 126 =
  20. 20.Half of 132 =
  21. 21.Half of 64 =
  22. 22.Double 28 =
  23. 23.Half of 44 =
  24. 24.Double 62 =
  25. 25.Double 97 =
  26. 26.Double 14 =
  27. 27.Half of 12 =
  28. 28.Half of 112 =
  29. 29.Half of 98 =
  30. 30.Half of 108 =
  31. 31.Double 31 =
  32. 32.Double 58 =
  33. 33.Double 85 =
  34. 34.Half of 156 =
  35. 35.Half of 74 =
  36. 36.Half of 152 =
  37. 37.Half of 114 =
  38. 38.Double 17 =
  39. 39.Double 72 =
  40. 40.Double 37 =

Answer key

  1. 186
  2. 126
  3. 122
  4. 114
  5. 44
  6. 168
  7. 88
  8. 22
  9. 16
  10. 184
  11. 66
  12. 32
  13. 43
  14. 21
  15. 94
  16. 52
  17. 164
  18. 46
  19. 63
  20. 66
  21. 32
  22. 56
  23. 22
  24. 124
  25. 194
  26. 28
  27. 6
  28. 56
  29. 49
  30. 54
  31. 62
  32. 116
  33. 170
  34. 78
  35. 37
  36. 76
  37. 57
  38. 34
  39. 144
  40. 74

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