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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 156 · 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 89 =
  2. 2.Double 19 =
  3. 3.Half of 114 =
  4. 4.Double 94 =
  5. 5.Half of 46 =
  6. 6.Half of 62 =
  7. 7.Double 71 =
  8. 8.Double 48 =
  9. 9.Half of 94 =
  10. 10.Double 31 =
  11. 11.Half of 172 =
  12. 12.Double 39 =
  13. 13.Double 91 =
  14. 14.Half of 164 =
  15. 15.Double 34 =
  16. 16.Double 97 =
  17. 17.Double 47 =
  18. 18.Half of 198 =
  19. 19.Double 25 =
  20. 20.Double 53 =
  21. 21.Half of 22 =
  22. 22.Half of 98 =
  23. 23.Double 14 =
  24. 24.Half of 74 =
  25. 25.Double 63 =
  26. 26.Half of 178 =
  27. 27.Double 51 =
  28. 28.Double 33 =
  29. 29.Half of 152 =
  30. 30.Double 76 =
  31. 31.Double 96 =
  32. 32.Half of 188 =
  33. 33.Double 55 =
  34. 34.Double 28 =
  35. 35.Half of 116 =
  36. 36.Half of 132 =
  37. 37.Half of 184 =
  38. 38.Double 21 =
  39. 39.Half of 32 =
  40. 40.Half of 142 =

Answer key

  1. 178
  2. 38
  3. 57
  4. 188
  5. 23
  6. 31
  7. 142
  8. 96
  9. 47
  10. 62
  11. 86
  12. 78
  13. 182
  14. 82
  15. 68
  16. 194
  17. 94
  18. 99
  19. 50
  20. 106
  21. 11
  22. 49
  23. 28
  24. 37
  25. 126
  26. 89
  27. 102
  28. 66
  29. 76
  30. 152
  31. 192
  32. 94
  33. 110
  34. 56
  35. 58
  36. 66
  37. 92
  38. 42
  39. 16
  40. 71

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