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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 183 · 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 99 =
  2. 2.Half of 126 =
  3. 3.Half of 152 =
  4. 4.Half of 62 =
  5. 5.Double 84 =
  6. 6.Double 57 =
  7. 7.Half of 28 =
  8. 8.Half of 32 =
  9. 9.Double 71 =
  10. 10.Double 75 =
  11. 11.Double 42 =
  12. 12.Double 41 =
  13. 13.Half of 182 =
  14. 14.Half of 16 =
  15. 15.Half of 136 =
  16. 16.Double 21 =
  17. 17.Double 37 =
  18. 18.Half of 82 =
  19. 19.Half of 186 =
  20. 20.Double 54 =
  21. 21.Half of 76 =
  22. 22.Half of 64 =
  23. 23.Double 28 =
  24. 24.Half of 38 =
  25. 25.Double 23 =
  26. 26.Double 56 =
  27. 27.Double 24 =
  28. 28.Double 67 =
  29. 29.Double 55 =
  30. 30.Double 98 =
  31. 31.Double 47 =
  32. 32.Double 81 =
  33. 33.Double 85 =
  34. 34.Half of 124 =
  35. 35.Half of 184 =
  36. 36.Half of 116 =
  37. 37.Half of 92 =
  38. 38.Double 63 =
  39. 39.Half of 54 =
  40. 40.Half of 48 =

Answer key

  1. 198
  2. 63
  3. 76
  4. 31
  5. 168
  6. 114
  7. 14
  8. 16
  9. 142
  10. 150
  11. 84
  12. 82
  13. 91
  14. 8
  15. 68
  16. 42
  17. 74
  18. 41
  19. 93
  20. 108
  21. 38
  22. 32
  23. 56
  24. 19
  25. 46
  26. 112
  27. 48
  28. 134
  29. 110
  30. 196
  31. 94
  32. 162
  33. 170
  34. 62
  35. 92
  36. 58
  37. 46
  38. 126
  39. 27
  40. 24

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