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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 408 · 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 88 =
  2. 2.Half of 148 =
  3. 3.Double 91 =
  4. 4.Half of 116 =
  5. 5.Half of 22 =
  6. 6.Double 61 =
  7. 7.Double 56 =
  8. 8.Double 41 =
  9. 9.Half of 66 =
  10. 10.Half of 118 =
  11. 11.Half of 32 =
  12. 12.Double 11 =
  13. 13.Double 16 =
  14. 14.Double 69 =
  15. 15.Double 43 =
  16. 16.Half of 108 =
  17. 17.Double 62 =
  18. 18.Double 25 =
  19. 19.Double 78 =
  20. 20.Half of 162 =
  21. 21.Half of 156 =
  22. 22.Double 31 =
  23. 23.Half of 34 =
  24. 24.Half of 56 =
  25. 25.Half of 46 =
  26. 26.Double 85 =
  27. 27.Double 84 =
  28. 28.Half of 28 =
  29. 29.Half of 54 =
  30. 30.Double 72 =
  31. 31.Double 17 =
  32. 32.Half of 112 =
  33. 33.Half of 76 =
  34. 34.Double 47 =
  35. 35.Double 74 =
  36. 36.Double 34 =
  37. 37.Double 12 =
  38. 38.Double 53 =
  39. 39.Double 52 =
  40. 40.Double 45 =

Answer key

  1. 176
  2. 74
  3. 182
  4. 58
  5. 11
  6. 122
  7. 112
  8. 82
  9. 33
  10. 59
  11. 16
  12. 22
  13. 32
  14. 138
  15. 86
  16. 54
  17. 124
  18. 50
  19. 156
  20. 81
  21. 78
  22. 62
  23. 17
  24. 28
  25. 23
  26. 170
  27. 168
  28. 14
  29. 27
  30. 144
  31. 34
  32. 56
  33. 38
  34. 94
  35. 148
  36. 68
  37. 24
  38. 106
  39. 104
  40. 90

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