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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 278 · 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 42 =
  2. 2.Double 31 =
  3. 3.Double 49 =
  4. 4.Half of 166 =
  5. 5.Double 21 =
  6. 6.Half of 104 =
  7. 7.Double 11 =
  8. 8.Double 28 =
  9. 9.Double 58 =
  10. 10.Double 91 =
  11. 11.Double 51 =
  12. 12.Double 48 =
  13. 13.Half of 52 =
  14. 14.Double 81 =
  15. 15.Double 71 =
  16. 16.Double 26 =
  17. 17.Half of 18 =
  18. 18.Half of 46 =
  19. 19.Double 32 =
  20. 20.Double 67 =
  21. 21.Double 85 =
  22. 22.Half of 26 =
  23. 23.Half of 122 =
  24. 24.Double 42 =
  25. 25.Double 68 =
  26. 26.Double 65 =
  27. 27.Double 39 =
  28. 28.Half of 32 =
  29. 29.Half of 28 =
  30. 30.Half of 164 =
  31. 31.Half of 94 =
  32. 32.Half of 82 =
  33. 33.Half of 198 =
  34. 34.Half of 178 =
  35. 35.Half of 72 =
  36. 36.Half of 162 =
  37. 37.Double 87 =
  38. 38.Half of 44 =
  39. 39.Half of 194 =
  40. 40.Half of 112 =

Answer key

  1. 21
  2. 62
  3. 98
  4. 83
  5. 42
  6. 52
  7. 22
  8. 56
  9. 116
  10. 182
  11. 102
  12. 96
  13. 26
  14. 162
  15. 142
  16. 52
  17. 9
  18. 23
  19. 64
  20. 134
  21. 170
  22. 13
  23. 61
  24. 84
  25. 136
  26. 130
  27. 78
  28. 16
  29. 14
  30. 82
  31. 47
  32. 41
  33. 99
  34. 89
  35. 36
  36. 81
  37. 174
  38. 22
  39. 97
  40. 56

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