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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 822 · 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 21 =
  2. 2.Half of 154 =
  3. 3.Double 95 =
  4. 4.Half of 116 =
  5. 5.Double 34 =
  6. 6.Half of 42 =
  7. 7.Half of 142 =
  8. 8.Double 25 =
  9. 9.Double 51 =
  10. 10.Half of 52 =
  11. 11.Double 49 =
  12. 12.Double 46 =
  13. 13.Half of 16 =
  14. 14.Half of 22 =
  15. 15.Double 91 =
  16. 16.Half of 32 =
  17. 17.Double 26 =
  18. 18.Double 16 =
  19. 19.Half of 176 =
  20. 20.Half of 106 =
  21. 21.Double 81 =
  22. 22.Double 94 =
  23. 23.Half of 78 =
  24. 24.Double 37 =
  25. 25.Double 53 =
  26. 26.Half of 184 =
  27. 27.Half of 92 =
  28. 28.Double 27 =
  29. 29.Double 55 =
  30. 30.Double 71 =
  31. 31.Half of 126 =
  32. 32.Half of 36 =
  33. 33.Half of 82 =
  34. 34.Double 19 =
  35. 35.Half of 136 =
  36. 36.Half of 186 =
  37. 37.Double 33 =
  38. 38.Half of 102 =
  39. 39.Double 29 =
  40. 40.Half of 46 =

Answer key

  1. 42
  2. 77
  3. 190
  4. 58
  5. 68
  6. 21
  7. 71
  8. 50
  9. 102
  10. 26
  11. 98
  12. 92
  13. 8
  14. 11
  15. 182
  16. 16
  17. 52
  18. 32
  19. 88
  20. 53
  21. 162
  22. 188
  23. 39
  24. 74
  25. 106
  26. 92
  27. 46
  28. 54
  29. 110
  30. 142
  31. 63
  32. 18
  33. 41
  34. 38
  35. 68
  36. 93
  37. 66
  38. 51
  39. 58
  40. 23

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