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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 591 · 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 31 =
  2. 2.Half of 198 =
  3. 3.Half of 86 =
  4. 4.Double 38 =
  5. 5.Double 79 =
  6. 6.Double 23 =
  7. 7.Double 84 =
  8. 8.Half of 62 =
  9. 9.Half of 16 =
  10. 10.Double 27 =
  11. 11.Double 28 =
  12. 12.Double 21 =
  13. 13.Double 81 =
  14. 14.Half of 56 =
  15. 15.Half of 144 =
  16. 16.Double 26 =
  17. 17.Double 65 =
  18. 18.Double 22 =
  19. 19.Half of 78 =
  20. 20.Half of 136 =
  21. 21.Half of 54 =
  22. 22.Double 62 =
  23. 23.Double 41 =
  24. 24.Half of 194 =
  25. 25.Double 73 =
  26. 26.Half of 124 =
  27. 27.Half of 128 =
  28. 28.Half of 106 =
  29. 29.Double 11 =
  30. 30.Double 91 =
  31. 31.Half of 146 =
  32. 32.Half of 188 =
  33. 33.Half of 168 =
  34. 34.Half of 192 =
  35. 35.Double 17 =
  36. 36.Double 61 =
  37. 37.Double 18 =
  38. 38.Double 56 =
  39. 39.Double 37 =
  40. 40.Half of 114 =

Answer key

  1. 62
  2. 99
  3. 43
  4. 76
  5. 158
  6. 46
  7. 168
  8. 31
  9. 8
  10. 54
  11. 56
  12. 42
  13. 162
  14. 28
  15. 72
  16. 52
  17. 130
  18. 44
  19. 39
  20. 68
  21. 27
  22. 124
  23. 82
  24. 97
  25. 146
  26. 62
  27. 64
  28. 53
  29. 22
  30. 182
  31. 73
  32. 94
  33. 84
  34. 96
  35. 34
  36. 122
  37. 36
  38. 112
  39. 74
  40. 57

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