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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 15 · 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 59 =
  2. 2.Half of 162 =
  3. 3.Double 68 =
  4. 4.Half of 24 =
  5. 5.Half of 188 =
  6. 6.Double 49 =
  7. 7.Half of 42 =
  8. 8.Half of 52 =
  9. 9.Double 13 =
  10. 10.Double 45 =
  11. 11.Half of 108 =
  12. 12.Double 19 =
  13. 13.Half of 66 =
  14. 14.Half of 106 =
  15. 15.Half of 26 =
  16. 16.Double 21 =
  17. 17.Half of 116 =
  18. 18.Double 37 =
  19. 19.Half of 62 =
  20. 20.Half of 46 =
  21. 21.Double 89 =
  22. 22.Double 26 =
  23. 23.Half of 94 =
  24. 24.Double 67 =
  25. 25.Double 79 =
  26. 26.Double 87 =
  27. 27.Double 85 =
  28. 28.Half of 48 =
  29. 29.Half of 92 =
  30. 30.Half of 36 =
  31. 31.Double 34 =
  32. 32.Double 78 =
  33. 33.Half of 58 =
  34. 34.Double 83 =
  35. 35.Double 92 =
  36. 36.Double 75 =
  37. 37.Double 31 =
  38. 38.Half of 142 =
  39. 39.Double 71 =
  40. 40.Double 64 =

Answer key

  1. 118
  2. 81
  3. 136
  4. 12
  5. 94
  6. 98
  7. 21
  8. 26
  9. 26
  10. 90
  11. 54
  12. 38
  13. 33
  14. 53
  15. 13
  16. 42
  17. 58
  18. 74
  19. 31
  20. 23
  21. 178
  22. 52
  23. 47
  24. 134
  25. 158
  26. 174
  27. 170
  28. 24
  29. 46
  30. 18
  31. 68
  32. 156
  33. 29
  34. 166
  35. 184
  36. 150
  37. 62
  38. 71
  39. 142
  40. 128

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