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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 418 · 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 95 =
  3. 3.Double 94 =
  4. 4.Half of 106 =
  5. 5.Half of 178 =
  6. 6.Half of 114 =
  7. 7.Half of 32 =
  8. 8.Double 51 =
  9. 9.Half of 112 =
  10. 10.Half of 154 =
  11. 11.Double 98 =
  12. 12.Double 18 =
  13. 13.Half of 44 =
  14. 14.Double 46 =
  15. 15.Double 28 =
  16. 16.Half of 94 =
  17. 17.Double 89 =
  18. 18.Half of 82 =
  19. 19.Double 84 =
  20. 20.Double 11 =
  21. 21.Double 12 =
  22. 22.Half of 176 =
  23. 23.Double 55 =
  24. 24.Double 44 =
  25. 25.Half of 116 =
  26. 26.Half of 88 =
  27. 27.Double 88 =
  28. 28.Double 72 =
  29. 29.Half of 184 =
  30. 30.Half of 166 =
  31. 31.Double 33 =
  32. 32.Double 19 =
  33. 33.Double 61 =
  34. 34.Half of 162 =
  35. 35.Half of 58 =
  36. 36.Half of 74 =
  37. 37.Double 25 =
  38. 38.Half of 72 =
  39. 39.Half of 148 =
  40. 40.Double 96 =

Answer key

  1. 62
  2. 190
  3. 188
  4. 53
  5. 89
  6. 57
  7. 16
  8. 102
  9. 56
  10. 77
  11. 196
  12. 36
  13. 22
  14. 92
  15. 56
  16. 47
  17. 178
  18. 41
  19. 168
  20. 22
  21. 24
  22. 88
  23. 110
  24. 88
  25. 58
  26. 44
  27. 176
  28. 144
  29. 92
  30. 83
  31. 66
  32. 38
  33. 122
  34. 81
  35. 29
  36. 37
  37. 50
  38. 36
  39. 74
  40. 192

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