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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 417 · 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 16 =
  2. 2.Half of 56 =
  3. 3.Double 23 =
  4. 4.Half of 174 =
  5. 5.Half of 104 =
  6. 6.Half of 198 =
  7. 7.Half of 176 =
  8. 8.Double 27 =
  9. 9.Double 24 =
  10. 10.Double 53 =
  11. 11.Half of 106 =
  12. 12.Double 17 =
  13. 13.Half of 126 =
  14. 14.Double 16 =
  15. 15.Double 25 =
  16. 16.Half of 98 =
  17. 17.Double 21 =
  18. 18.Double 69 =
  19. 19.Half of 68 =
  20. 20.Double 85 =
  21. 21.Double 41 =
  22. 22.Double 79 =
  23. 23.Double 31 =
  24. 24.Double 91 =
  25. 25.Half of 154 =
  26. 26.Half of 152 =
  27. 27.Double 45 =
  28. 28.Double 43 =
  29. 29.Half of 122 =
  30. 30.Double 39 =
  31. 31.Half of 52 =
  32. 32.Double 61 =
  33. 33.Half of 172 =
  34. 34.Half of 186 =
  35. 35.Double 22 =
  36. 36.Double 48 =
  37. 37.Double 19 =
  38. 38.Double 12 =
  39. 39.Double 15 =
  40. 40.Double 58 =

Answer key

  1. 8
  2. 28
  3. 46
  4. 87
  5. 52
  6. 99
  7. 88
  8. 54
  9. 48
  10. 106
  11. 53
  12. 34
  13. 63
  14. 32
  15. 50
  16. 49
  17. 42
  18. 138
  19. 34
  20. 170
  21. 82
  22. 158
  23. 62
  24. 182
  25. 77
  26. 76
  27. 90
  28. 86
  29. 61
  30. 78
  31. 26
  32. 122
  33. 86
  34. 93
  35. 44
  36. 96
  37. 38
  38. 24
  39. 30
  40. 116

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