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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 28 · 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 71 =
  2. 2.Double 85 =
  3. 3.Half of 32 =
  4. 4.Half of 108 =
  5. 5.Double 17 =
  6. 6.Half of 154 =
  7. 7.Double 44 =
  8. 8.Double 61 =
  9. 9.Double 87 =
  10. 10.Half of 72 =
  11. 11.Double 58 =
  12. 12.Double 42 =
  13. 13.Double 32 =
  14. 14.Double 51 =
  15. 15.Half of 178 =
  16. 16.Double 88 =
  17. 17.Half of 58 =
  18. 18.Double 47 =
  19. 19.Double 26 =
  20. 20.Double 41 =
  21. 21.Double 27 =
  22. 22.Double 69 =
  23. 23.Half of 52 =
  24. 24.Half of 134 =
  25. 25.Half of 124 =
  26. 26.Double 97 =
  27. 27.Half of 62 =
  28. 28.Double 64 =
  29. 29.Double 29 =
  30. 30.Double 54 =
  31. 31.Double 65 =
  32. 32.Double 56 =
  33. 33.Half of 66 =
  34. 34.Double 53 =
  35. 35.Double 46 =
  36. 36.Double 49 =
  37. 37.Half of 176 =
  38. 38.Half of 44 =
  39. 39.Double 98 =
  40. 40.Double 84 =

Answer key

  1. 142
  2. 170
  3. 16
  4. 54
  5. 34
  6. 77
  7. 88
  8. 122
  9. 174
  10. 36
  11. 116
  12. 84
  13. 64
  14. 102
  15. 89
  16. 176
  17. 29
  18. 94
  19. 52
  20. 82
  21. 54
  22. 138
  23. 26
  24. 67
  25. 62
  26. 194
  27. 31
  28. 128
  29. 58
  30. 108
  31. 130
  32. 112
  33. 33
  34. 106
  35. 92
  36. 98
  37. 88
  38. 22
  39. 196
  40. 168

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