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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 539 · 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 134 =
  2. 2.Half of 104 =
  3. 3.Half of 172 =
  4. 4.Half of 188 =
  5. 5.Half of 178 =
  6. 6.Double 21 =
  7. 7.Double 22 =
  8. 8.Half of 26 =
  9. 9.Double 15 =
  10. 10.Double 26 =
  11. 11.Half of 122 =
  12. 12.Double 51 =
  13. 13.Double 13 =
  14. 14.Double 63 =
  15. 15.Double 28 =
  16. 16.Half of 132 =
  17. 17.Half of 112 =
  18. 18.Double 85 =
  19. 19.Half of 76 =
  20. 20.Double 48 =
  21. 21.Double 58 =
  22. 22.Half of 22 =
  23. 23.Double 23 =
  24. 24.Double 16 =
  25. 25.Half of 182 =
  26. 26.Half of 152 =
  27. 27.Double 47 =
  28. 28.Double 75 =
  29. 29.Double 81 =
  30. 30.Half of 94 =
  31. 31.Double 91 =
  32. 32.Half of 14 =
  33. 33.Double 33 =
  34. 34.Half of 54 =
  35. 35.Double 17 =
  36. 36.Half of 194 =
  37. 37.Double 62 =
  38. 38.Half of 52 =
  39. 39.Double 92 =
  40. 40.Double 29 =

Answer key

  1. 67
  2. 52
  3. 86
  4. 94
  5. 89
  6. 42
  7. 44
  8. 13
  9. 30
  10. 52
  11. 61
  12. 102
  13. 26
  14. 126
  15. 56
  16. 66
  17. 56
  18. 170
  19. 38
  20. 96
  21. 116
  22. 11
  23. 46
  24. 32
  25. 91
  26. 76
  27. 94
  28. 150
  29. 162
  30. 47
  31. 182
  32. 7
  33. 66
  34. 27
  35. 34
  36. 97
  37. 124
  38. 26
  39. 184
  40. 58

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