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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 651 · 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 52 =
  2. 2.Half of 104 =
  3. 3.Double 58 =
  4. 4.Double 26 =
  5. 5.Double 23 =
  6. 6.Half of 58 =
  7. 7.Double 92 =
  8. 8.Half of 188 =
  9. 9.Double 14 =
  10. 10.Half of 168 =
  11. 11.Double 91 =
  12. 12.Half of 86 =
  13. 13.Double 31 =
  14. 14.Half of 132 =
  15. 15.Double 95 =
  16. 16.Double 93 =
  17. 17.Half of 192 =
  18. 18.Half of 66 =
  19. 19.Double 73 =
  20. 20.Half of 142 =
  21. 21.Double 19 =
  22. 22.Double 21 =
  23. 23.Half of 134 =
  24. 24.Double 12 =
  25. 25.Double 57 =
  26. 26.Half of 26 =
  27. 27.Half of 72 =
  28. 28.Double 64 =
  29. 29.Half of 12 =
  30. 30.Half of 122 =
  31. 31.Half of 118 =
  32. 32.Half of 92 =
  33. 33.Half of 106 =
  34. 34.Double 55 =
  35. 35.Half of 146 =
  36. 36.Half of 32 =
  37. 37.Double 32 =
  38. 38.Half of 56 =
  39. 39.Double 39 =
  40. 40.Double 49 =

Answer key

  1. 104
  2. 52
  3. 116
  4. 52
  5. 46
  6. 29
  7. 184
  8. 94
  9. 28
  10. 84
  11. 182
  12. 43
  13. 62
  14. 66
  15. 190
  16. 186
  17. 96
  18. 33
  19. 146
  20. 71
  21. 38
  22. 42
  23. 67
  24. 24
  25. 114
  26. 13
  27. 36
  28. 128
  29. 6
  30. 61
  31. 59
  32. 46
  33. 53
  34. 110
  35. 73
  36. 16
  37. 64
  38. 28
  39. 78
  40. 98

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