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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 434 · 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.Half of 34 =
  2. 2.Half of 42 =
  3. 3.Double 61 =
  4. 4.Double 57 =
  5. 5.Double 52 =
  6. 6.Half of 32 =
  7. 7.Double 26 =
  8. 8.Double 33 =
  9. 9.Half of 112 =
  10. 10.Half of 72 =
  11. 11.Double 24 =
  12. 12.Double 83 =
  13. 13.Half of 88 =
  14. 14.Double 36 =
  15. 15.Half of 14 =
  16. 16.Half of 122 =
  17. 17.Double 31 =
  18. 18.Half of 138 =
  19. 19.Half of 132 =
  20. 20.Half of 38 =
  21. 21.Half of 52 =
  22. 22.Double 16 =
  23. 23.Half of 96 =
  24. 24.Double 62 =
  25. 25.Double 23 =
  26. 26.Half of 68 =
  27. 27.Half of 104 =
  28. 28.Double 65 =
  29. 29.Double 29 =
  30. 30.Half of 198 =
  31. 31.Half of 186 =
  32. 32.Double 39 =
  33. 33.Half of 28 =
  34. 34.Double 91 =
  35. 35.Double 86 =
  36. 36.Double 21 =
  37. 37.Double 51 =
  38. 38.Double 92 =
  39. 39.Double 28 =
  40. 40.Double 81 =

Answer key

  1. 17
  2. 21
  3. 122
  4. 114
  5. 104
  6. 16
  7. 52
  8. 66
  9. 56
  10. 36
  11. 48
  12. 166
  13. 44
  14. 72
  15. 7
  16. 61
  17. 62
  18. 69
  19. 66
  20. 19
  21. 26
  22. 32
  23. 48
  24. 124
  25. 46
  26. 34
  27. 52
  28. 130
  29. 58
  30. 99
  31. 93
  32. 78
  33. 14
  34. 182
  35. 172
  36. 42
  37. 102
  38. 184
  39. 56
  40. 162

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