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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 275 · 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 53 =
  2. 2.Double 66 =
  3. 3.Half of 146 =
  4. 4.Half of 42 =
  5. 5.Double 39 =
  6. 6.Half of 32 =
  7. 7.Double 32 =
  8. 8.Double 69 =
  9. 9.Half of 48 =
  10. 10.Double 38 =
  11. 11.Half of 74 =
  12. 12.Double 29 =
  13. 13.Half of 102 =
  14. 14.Double 81 =
  15. 15.Double 31 =
  16. 16.Double 27 =
  17. 17.Half of 52 =
  18. 18.Double 51 =
  19. 19.Half of 188 =
  20. 20.Double 56 =
  21. 21.Half of 78 =
  22. 22.Half of 178 =
  23. 23.Double 25 =
  24. 24.Half of 72 =
  25. 25.Half of 176 =
  26. 26.Half of 62 =
  27. 27.Double 21 =
  28. 28.Double 48 =
  29. 29.Half of 76 =
  30. 30.Double 41 =
  31. 31.Double 43 =
  32. 32.Double 99 =
  33. 33.Half of 144 =
  34. 34.Double 15 =
  35. 35.Double 83 =
  36. 36.Double 33 =
  37. 37.Double 11 =
  38. 38.Double 22 =
  39. 39.Double 77 =
  40. 40.Double 49 =

Answer key

  1. 106
  2. 132
  3. 73
  4. 21
  5. 78
  6. 16
  7. 64
  8. 138
  9. 24
  10. 76
  11. 37
  12. 58
  13. 51
  14. 162
  15. 62
  16. 54
  17. 26
  18. 102
  19. 94
  20. 112
  21. 39
  22. 89
  23. 50
  24. 36
  25. 88
  26. 31
  27. 42
  28. 96
  29. 38
  30. 82
  31. 86
  32. 198
  33. 72
  34. 30
  35. 166
  36. 66
  37. 22
  38. 44
  39. 154
  40. 98

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