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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 30 · 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 72 =
  2. 2.Double 49 =
  3. 3.Half of 68 =
  4. 4.Double 46 =
  5. 5.Half of 48 =
  6. 6.Half of 16 =
  7. 7.Double 17 =
  8. 8.Double 25 =
  9. 9.Half of 18 =
  10. 10.Half of 88 =
  11. 11.Double 61 =
  12. 12.Double 54 =
  13. 13.Half of 136 =
  14. 14.Half of 116 =
  15. 15.Half of 64 =
  16. 16.Half of 32 =
  17. 17.Half of 144 =
  18. 18.Double 38 =
  19. 19.Half of 98 =
  20. 20.Double 79 =
  21. 21.Double 75 =
  22. 22.Half of 42 =
  23. 23.Double 81 =
  24. 24.Half of 118 =
  25. 25.Double 76 =
  26. 26.Double 35 =
  27. 27.Half of 132 =
  28. 28.Double 93 =
  29. 29.Half of 22 =
  30. 30.Double 37 =
  31. 31.Half of 182 =
  32. 32.Double 34 =
  33. 33.Double 84 =
  34. 34.Half of 74 =
  35. 35.Half of 96 =
  36. 36.Double 89 =
  37. 37.Double 53 =
  38. 38.Half of 164 =
  39. 39.Double 33 =
  40. 40.Half of 82 =

Answer key

  1. 144
  2. 98
  3. 34
  4. 92
  5. 24
  6. 8
  7. 34
  8. 50
  9. 9
  10. 44
  11. 122
  12. 108
  13. 68
  14. 58
  15. 32
  16. 16
  17. 72
  18. 76
  19. 49
  20. 158
  21. 150
  22. 21
  23. 162
  24. 59
  25. 152
  26. 70
  27. 66
  28. 186
  29. 11
  30. 74
  31. 91
  32. 68
  33. 168
  34. 37
  35. 48
  36. 178
  37. 106
  38. 82
  39. 66
  40. 41

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