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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 90 · 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 92 =
  2. 2.Double 35 =
  3. 3.Double 73 =
  4. 4.Half of 178 =
  5. 5.Double 71 =
  6. 6.Half of 94 =
  7. 7.Half of 182 =
  8. 8.Half of 76 =
  9. 9.Double 27 =
  10. 10.Double 61 =
  11. 11.Double 47 =
  12. 12.Double 24 =
  13. 13.Double 39 =
  14. 14.Half of 32 =
  15. 15.Half of 142 =
  16. 16.Double 32 =
  17. 17.Double 46 =
  18. 18.Double 21 =
  19. 19.Half of 146 =
  20. 20.Double 36 =
  21. 21.Half of 172 =
  22. 22.Double 91 =
  23. 23.Double 31 =
  24. 24.Half of 176 =
  25. 25.Double 45 =
  26. 26.Double 33 =
  27. 27.Double 29 =
  28. 28.Double 17 =
  29. 29.Double 79 =
  30. 30.Double 69 =
  31. 31.Half of 106 =
  32. 32.Half of 22 =
  33. 33.Double 28 =
  34. 34.Double 65 =
  35. 35.Half of 98 =
  36. 36.Double 54 =
  37. 37.Double 11 =
  38. 38.Half of 44 =
  39. 39.Half of 124 =
  40. 40.Double 41 =

Answer key

  1. 46
  2. 70
  3. 146
  4. 89
  5. 142
  6. 47
  7. 91
  8. 38
  9. 54
  10. 122
  11. 94
  12. 48
  13. 78
  14. 16
  15. 71
  16. 64
  17. 92
  18. 42
  19. 73
  20. 72
  21. 86
  22. 182
  23. 62
  24. 88
  25. 90
  26. 66
  27. 58
  28. 34
  29. 158
  30. 138
  31. 53
  32. 11
  33. 56
  34. 130
  35. 49
  36. 108
  37. 22
  38. 22
  39. 62
  40. 82

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