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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 209 · 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 38 =
  2. 2.Half of 26 =
  3. 3.Half of 152 =
  4. 4.Double 73 =
  5. 5.Double 86 =
  6. 6.Half of 32 =
  7. 7.Double 91 =
  8. 8.Double 15 =
  9. 9.Double 54 =
  10. 10.Half of 126 =
  11. 11.Double 69 =
  12. 12.Half of 106 =
  13. 13.Double 27 =
  14. 14.Half of 36 =
  15. 15.Half of 148 =
  16. 16.Double 31 =
  17. 17.Double 23 =
  18. 18.Double 35 =
  19. 19.Double 87 =
  20. 20.Half of 128 =
  21. 21.Half of 138 =
  22. 22.Half of 184 =
  23. 23.Half of 42 =
  24. 24.Half of 158 =
  25. 25.Double 12 =
  26. 26.Double 65 =
  27. 27.Double 81 =
  28. 28.Double 71 =
  29. 29.Double 56 =
  30. 30.Half of 132 =
  31. 31.Half of 22 =
  32. 32.Half of 76 =
  33. 33.Half of 182 =
  34. 34.Half of 178 =
  35. 35.Half of 46 =
  36. 36.Double 25 =
  37. 37.Half of 136 =
  38. 38.Half of 52 =
  39. 39.Half of 28 =
  40. 40.Double 61 =

Answer key

  1. 76
  2. 13
  3. 76
  4. 146
  5. 172
  6. 16
  7. 182
  8. 30
  9. 108
  10. 63
  11. 138
  12. 53
  13. 54
  14. 18
  15. 74
  16. 62
  17. 46
  18. 70
  19. 174
  20. 64
  21. 69
  22. 92
  23. 21
  24. 79
  25. 24
  26. 130
  27. 162
  28. 142
  29. 112
  30. 66
  31. 11
  32. 38
  33. 91
  34. 89
  35. 23
  36. 50
  37. 68
  38. 26
  39. 14
  40. 122

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