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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 123 · 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 61 =
  2. 2.Double 29 =
  3. 3.Double 39 =
  4. 4.Double 24 =
  5. 5.Half of 154 =
  6. 6.Half of 126 =
  7. 7.Half of 52 =
  8. 8.Half of 92 =
  9. 9.Half of 34 =
  10. 10.Half of 58 =
  11. 11.Double 55 =
  12. 12.Half of 132 =
  13. 13.Double 81 =
  14. 14.Half of 98 =
  15. 15.Half of 192 =
  16. 16.Half of 44 =
  17. 17.Half of 172 =
  18. 18.Double 56 =
  19. 19.Half of 84 =
  20. 20.Double 22 =
  21. 21.Half of 166 =
  22. 22.Half of 122 =
  23. 23.Double 17 =
  24. 24.Half of 32 =
  25. 25.Half of 112 =
  26. 26.Double 32 =
  27. 27.Half of 138 =
  28. 28.Half of 152 =
  29. 29.Double 76 =
  30. 30.Double 18 =
  31. 31.Half of 176 =
  32. 32.Double 21 =
  33. 33.Double 87 =
  34. 34.Half of 104 =
  35. 35.Double 72 =
  36. 36.Half of 156 =
  37. 37.Double 66 =
  38. 38.Half of 22 =
  39. 39.Half of 178 =
  40. 40.Double 67 =

Answer key

  1. 122
  2. 58
  3. 78
  4. 48
  5. 77
  6. 63
  7. 26
  8. 46
  9. 17
  10. 29
  11. 110
  12. 66
  13. 162
  14. 49
  15. 96
  16. 22
  17. 86
  18. 112
  19. 42
  20. 44
  21. 83
  22. 61
  23. 34
  24. 16
  25. 56
  26. 64
  27. 69
  28. 76
  29. 152
  30. 36
  31. 88
  32. 42
  33. 174
  34. 52
  35. 144
  36. 78
  37. 132
  38. 11
  39. 89
  40. 134

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