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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 654 · 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 21 =
  2. 2.Double 14 =
  3. 3.Double 16 =
  4. 4.Double 15 =
  5. 5.Double 24 =
  6. 6.Double 18 =
  7. 7.Double 41 =
  8. 8.Half of 62 =
  9. 9.Half of 22 =
  10. 10.Half of 142 =
  11. 11.Half of 118 =
  12. 12.Half of 92 =
  13. 13.Double 22 =
  14. 14.Double 35 =
  15. 15.Double 39 =
  16. 16.Double 73 =
  17. 17.Half of 38 =
  18. 18.Half of 162 =
  19. 19.Double 77 =
  20. 20.Half of 64 =
  21. 21.Half of 182 =
  22. 22.Half of 76 =
  23. 23.Double 27 =
  24. 24.Half of 192 =
  25. 25.Double 31 =
  26. 26.Double 51 =
  27. 27.Half of 166 =
  28. 28.Double 26 =
  29. 29.Double 99 =
  30. 30.Half of 78 =
  31. 31.Half of 14 =
  32. 32.Double 69 =
  33. 33.Double 86 =
  34. 34.Half of 158 =
  35. 35.Double 82 =
  36. 36.Half of 112 =
  37. 37.Double 52 =
  38. 38.Half of 172 =
  39. 39.Half of 148 =
  40. 40.Double 68 =

Answer key

  1. 42
  2. 28
  3. 32
  4. 30
  5. 48
  6. 36
  7. 82
  8. 31
  9. 11
  10. 71
  11. 59
  12. 46
  13. 44
  14. 70
  15. 78
  16. 146
  17. 19
  18. 81
  19. 154
  20. 32
  21. 91
  22. 38
  23. 54
  24. 96
  25. 62
  26. 102
  27. 83
  28. 52
  29. 198
  30. 39
  31. 7
  32. 138
  33. 172
  34. 79
  35. 164
  36. 56
  37. 104
  38. 86
  39. 74
  40. 136

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