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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 697 · 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 18 =
  2. 2.Half of 156 =
  3. 3.Half of 114 =
  4. 4.Double 85 =
  5. 5.Half of 172 =
  6. 6.Double 61 =
  7. 7.Double 86 =
  8. 8.Double 41 =
  9. 9.Double 92 =
  10. 10.Half of 32 =
  11. 11.Half of 52 =
  12. 12.Double 31 =
  13. 13.Double 71 =
  14. 14.Half of 162 =
  15. 15.Double 87 =
  16. 16.Double 33 =
  17. 17.Double 15 =
  18. 18.Half of 138 =
  19. 19.Half of 192 =
  20. 20.Double 62 =
  21. 21.Double 22 =
  22. 22.Half of 184 =
  23. 23.Double 82 =
  24. 24.Double 53 =
  25. 25.Half of 104 =
  26. 26.Double 95 =
  27. 27.Half of 68 =
  28. 28.Double 29 =
  29. 29.Half of 158 =
  30. 30.Double 32 =
  31. 31.Double 35 =
  32. 32.Half of 22 =
  33. 33.Double 78 =
  34. 34.Half of 86 =
  35. 35.Half of 12 =
  36. 36.Double 17 =
  37. 37.Double 91 =
  38. 38.Double 77 =
  39. 39.Double 88 =
  40. 40.Double 68 =

Answer key

  1. 36
  2. 78
  3. 57
  4. 170
  5. 86
  6. 122
  7. 172
  8. 82
  9. 184
  10. 16
  11. 26
  12. 62
  13. 142
  14. 81
  15. 174
  16. 66
  17. 30
  18. 69
  19. 96
  20. 124
  21. 44
  22. 92
  23. 164
  24. 106
  25. 52
  26. 190
  27. 34
  28. 58
  29. 79
  30. 64
  31. 70
  32. 11
  33. 156
  34. 43
  35. 6
  36. 34
  37. 182
  38. 154
  39. 176
  40. 136

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