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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 305 · 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 97 =
  2. 2.Half of 88 =
  3. 3.Double 54 =
  4. 4.Half of 52 =
  5. 5.Double 96 =
  6. 6.Double 15 =
  7. 7.Double 47 =
  8. 8.Half of 106 =
  9. 9.Half of 42 =
  10. 10.Half of 184 =
  11. 11.Half of 32 =
  12. 12.Double 94 =
  13. 13.Double 57 =
  14. 14.Double 22 =
  15. 15.Half of 98 =
  16. 16.Double 81 =
  17. 17.Half of 166 =
  18. 18.Double 62 =
  19. 19.Double 28 =
  20. 20.Half of 198 =
  21. 21.Double 38 =
  22. 22.Double 14 =
  23. 23.Half of 156 =
  24. 24.Double 33 =
  25. 25.Double 11 =
  26. 26.Double 92 =
  27. 27.Double 51 =
  28. 28.Double 52 =
  29. 29.Half of 182 =
  30. 30.Double 46 =
  31. 31.Half of 94 =
  32. 32.Half of 132 =
  33. 33.Double 59 =
  34. 34.Half of 64 =
  35. 35.Half of 146 =
  36. 36.Double 87 =
  37. 37.Double 64 =
  38. 38.Double 43 =
  39. 39.Double 89 =
  40. 40.Double 99 =

Answer key

  1. 194
  2. 44
  3. 108
  4. 26
  5. 192
  6. 30
  7. 94
  8. 53
  9. 21
  10. 92
  11. 16
  12. 188
  13. 114
  14. 44
  15. 49
  16. 162
  17. 83
  18. 124
  19. 56
  20. 99
  21. 76
  22. 28
  23. 78
  24. 66
  25. 22
  26. 184
  27. 102
  28. 104
  29. 91
  30. 92
  31. 47
  32. 66
  33. 118
  34. 32
  35. 73
  36. 174
  37. 128
  38. 86
  39. 178
  40. 198

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