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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 513 · 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 89 =
  2. 2.Double 76 =
  3. 3.Double 31 =
  4. 4.Double 25 =
  5. 5.Double 24 =
  6. 6.Half of 64 =
  7. 7.Double 74 =
  8. 8.Half of 134 =
  9. 9.Double 35 =
  10. 10.Half of 82 =
  11. 11.Double 37 =
  12. 12.Double 51 =
  13. 13.Half of 44 =
  14. 14.Double 14 =
  15. 15.Double 75 =
  16. 16.Half of 132 =
  17. 17.Half of 144 =
  18. 18.Half of 164 =
  19. 19.Double 72 =
  20. 20.Half of 142 =
  21. 21.Double 63 =
  22. 22.Half of 172 =
  23. 23.Double 12 =
  24. 24.Double 11 =
  25. 25.Double 61 =
  26. 26.Half of 118 =
  27. 27.Half of 152 =
  28. 28.Double 99 =
  29. 29.Half of 58 =
  30. 30.Double 19 =
  31. 31.Half of 52 =
  32. 32.Half of 176 =
  33. 33.Double 21 =
  34. 34.Half of 38 =
  35. 35.Half of 84 =
  36. 36.Half of 88 =
  37. 37.Half of 102 =
  38. 38.Double 81 =
  39. 39.Double 16 =
  40. 40.Double 41 =

Answer key

  1. 178
  2. 152
  3. 62
  4. 50
  5. 48
  6. 32
  7. 148
  8. 67
  9. 70
  10. 41
  11. 74
  12. 102
  13. 22
  14. 28
  15. 150
  16. 66
  17. 72
  18. 82
  19. 144
  20. 71
  21. 126
  22. 86
  23. 24
  24. 22
  25. 122
  26. 59
  27. 76
  28. 198
  29. 29
  30. 38
  31. 26
  32. 88
  33. 42
  34. 19
  35. 42
  36. 44
  37. 51
  38. 162
  39. 32
  40. 82

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