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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 776 · 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 98 =
  2. 2.Half of 166 =
  3. 3.Half of 84 =
  4. 4.Half of 18 =
  5. 5.Double 21 =
  6. 6.Half of 168 =
  7. 7.Half of 58 =
  8. 8.Double 22 =
  9. 9.Double 33 =
  10. 10.Double 41 =
  11. 11.Double 13 =
  12. 12.Half of 22 =
  13. 13.Half of 122 =
  14. 14.Half of 52 =
  15. 15.Double 19 =
  16. 16.Double 28 =
  17. 17.Half of 92 =
  18. 18.Half of 118 =
  19. 19.Half of 156 =
  20. 20.Double 73 =
  21. 21.Double 83 =
  22. 22.Half of 178 =
  23. 23.Double 57 =
  24. 24.Double 39 =
  25. 25.Double 18 =
  26. 26.Double 64 =
  27. 27.Half of 54 =
  28. 28.Half of 76 =
  29. 29.Double 35 =
  30. 30.Double 96 =
  31. 31.Half of 182 =
  32. 32.Double 71 =
  33. 33.Double 32 =
  34. 34.Half of 32 =
  35. 35.Double 26 =
  36. 36.Double 37 =
  37. 37.Double 45 =
  38. 38.Double 67 =
  39. 39.Double 84 =
  40. 40.Half of 86 =

Answer key

  1. 49
  2. 83
  3. 42
  4. 9
  5. 42
  6. 84
  7. 29
  8. 44
  9. 66
  10. 82
  11. 26
  12. 11
  13. 61
  14. 26
  15. 38
  16. 56
  17. 46
  18. 59
  19. 78
  20. 146
  21. 166
  22. 89
  23. 114
  24. 78
  25. 36
  26. 128
  27. 27
  28. 38
  29. 70
  30. 192
  31. 91
  32. 142
  33. 64
  34. 16
  35. 52
  36. 74
  37. 90
  38. 134
  39. 168
  40. 43

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