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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 478 · 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.Half of 168 =
  3. 3.Half of 74 =
  4. 4.Double 43 =
  5. 5.Double 14 =
  6. 6.Half of 32 =
  7. 7.Half of 92 =
  8. 8.Double 38 =
  9. 9.Double 74 =
  10. 10.Half of 156 =
  11. 11.Double 97 =
  12. 12.Half of 138 =
  13. 13.Half of 166 =
  14. 14.Double 73 =
  15. 15.Double 24 =
  16. 16.Half of 112 =
  17. 17.Double 75 =
  18. 18.Half of 42 =
  19. 19.Half of 142 =
  20. 20.Double 81 =
  21. 21.Double 56 =
  22. 22.Half of 192 =
  23. 23.Double 93 =
  24. 24.Double 87 =
  25. 25.Double 21 =
  26. 26.Half of 128 =
  27. 27.Double 42 =
  28. 28.Double 51 =
  29. 29.Double 17 =
  30. 30.Double 45 =
  31. 31.Half of 46 =
  32. 32.Double 67 =
  33. 33.Half of 52 =
  34. 34.Double 71 =
  35. 35.Half of 16 =
  36. 36.Double 26 =
  37. 37.Half of 194 =
  38. 38.Half of 106 =
  39. 39.Double 86 =
  40. 40.Double 22 =

Answer key

  1. 106
  2. 84
  3. 37
  4. 86
  5. 28
  6. 16
  7. 46
  8. 76
  9. 148
  10. 78
  11. 194
  12. 69
  13. 83
  14. 146
  15. 48
  16. 56
  17. 150
  18. 21
  19. 71
  20. 162
  21. 112
  22. 96
  23. 186
  24. 174
  25. 42
  26. 64
  27. 84
  28. 102
  29. 34
  30. 90
  31. 23
  32. 134
  33. 26
  34. 142
  35. 8
  36. 52
  37. 97
  38. 53
  39. 172
  40. 44

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