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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 456 · 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 37 =
  2. 2.Half of 82 =
  3. 3.Half of 98 =
  4. 4.Half of 62 =
  5. 5.Half of 186 =
  6. 6.Double 43 =
  7. 7.Half of 18 =
  8. 8.Half of 142 =
  9. 9.Half of 162 =
  10. 10.Double 49 =
  11. 11.Double 16 =
  12. 12.Half of 86 =
  13. 13.Double 26 =
  14. 14.Half of 144 =
  15. 15.Half of 182 =
  16. 16.Double 21 =
  17. 17.Half of 154 =
  18. 18.Half of 102 =
  19. 19.Half of 178 =
  20. 20.Double 11 =
  21. 21.Half of 76 =
  22. 22.Half of 22 =
  23. 23.Double 51 =
  24. 24.Double 23 =
  25. 25.Half of 24 =
  26. 26.Half of 92 =
  27. 27.Double 66 =
  28. 28.Half of 32 =
  29. 29.Double 64 =
  30. 30.Double 72 =
  31. 31.Half of 14 =
  32. 32.Half of 72 =
  33. 33.Double 28 =
  34. 34.Half of 148 =
  35. 35.Double 29 =
  36. 36.Double 71 =
  37. 37.Double 61 =
  38. 38.Double 54 =
  39. 39.Half of 188 =
  40. 40.Half of 118 =

Answer key

  1. 74
  2. 41
  3. 49
  4. 31
  5. 93
  6. 86
  7. 9
  8. 71
  9. 81
  10. 98
  11. 32
  12. 43
  13. 52
  14. 72
  15. 91
  16. 42
  17. 77
  18. 51
  19. 89
  20. 22
  21. 38
  22. 11
  23. 102
  24. 46
  25. 12
  26. 46
  27. 132
  28. 16
  29. 128
  30. 144
  31. 7
  32. 36
  33. 56
  34. 74
  35. 58
  36. 142
  37. 122
  38. 108
  39. 94
  40. 59

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