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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 610 · 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 38 =
  2. 2.Double 21 =
  3. 3.Double 62 =
  4. 4.Half of 62 =
  5. 5.Half of 182 =
  6. 6.Half of 154 =
  7. 7.Half of 114 =
  8. 8.Half of 142 =
  9. 9.Double 99 =
  10. 10.Double 44 =
  11. 11.Half of 14 =
  12. 12.Half of 94 =
  13. 13.Double 31 =
  14. 14.Half of 42 =
  15. 15.Double 22 =
  16. 16.Half of 164 =
  17. 17.Half of 66 =
  18. 18.Double 25 =
  19. 19.Half of 12 =
  20. 20.Double 53 =
  21. 21.Double 76 =
  22. 22.Half of 156 =
  23. 23.Double 29 =
  24. 24.Half of 138 =
  25. 25.Double 13 =
  26. 26.Double 93 =
  27. 27.Half of 26 =
  28. 28.Double 57 =
  29. 29.Half of 146 =
  30. 30.Double 12 =
  31. 31.Half of 98 =
  32. 32.Half of 122 =
  33. 33.Double 85 =
  34. 34.Half of 166 =
  35. 35.Double 14 =
  36. 36.Double 23 =
  37. 37.Double 28 =
  38. 38.Half of 32 =
  39. 39.Double 17 =
  40. 40.Double 95 =

Answer key

  1. 76
  2. 42
  3. 124
  4. 31
  5. 91
  6. 77
  7. 57
  8. 71
  9. 198
  10. 88
  11. 7
  12. 47
  13. 62
  14. 21
  15. 44
  16. 82
  17. 33
  18. 50
  19. 6
  20. 106
  21. 152
  22. 78
  23. 58
  24. 69
  25. 26
  26. 186
  27. 13
  28. 114
  29. 73
  30. 24
  31. 49
  32. 61
  33. 170
  34. 83
  35. 28
  36. 46
  37. 56
  38. 16
  39. 34
  40. 190

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