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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 426 · 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 79 =
  2. 2.Half of 162 =
  3. 3.Double 17 =
  4. 4.Half of 62 =
  5. 5.Half of 112 =
  6. 6.Double 61 =
  7. 7.Half of 22 =
  8. 8.Double 27 =
  9. 9.Half of 138 =
  10. 10.Double 14 =
  11. 11.Half of 58 =
  12. 12.Double 53 =
  13. 13.Half of 68 =
  14. 14.Double 92 =
  15. 15.Half of 122 =
  16. 16.Half of 128 =
  17. 17.Half of 84 =
  18. 18.Double 94 =
  19. 19.Double 78 =
  20. 20.Half of 102 =
  21. 21.Half of 18 =
  22. 22.Double 31 =
  23. 23.Half of 132 =
  24. 24.Double 28 =
  25. 25.Double 37 =
  26. 26.Double 81 =
  27. 27.Double 35 =
  28. 28.Double 63 =
  29. 29.Half of 172 =
  30. 30.Double 13 =
  31. 31.Double 71 =
  32. 32.Half of 96 =
  33. 33.Half of 164 =
  34. 34.Double 21 =
  35. 35.Double 23 =
  36. 36.Double 41 =
  37. 37.Half of 116 =
  38. 38.Half of 156 =
  39. 39.Half of 92 =
  40. 40.Double 25 =

Answer key

  1. 158
  2. 81
  3. 34
  4. 31
  5. 56
  6. 122
  7. 11
  8. 54
  9. 69
  10. 28
  11. 29
  12. 106
  13. 34
  14. 184
  15. 61
  16. 64
  17. 42
  18. 188
  19. 156
  20. 51
  21. 9
  22. 62
  23. 66
  24. 56
  25. 74
  26. 162
  27. 70
  28. 126
  29. 86
  30. 26
  31. 142
  32. 48
  33. 82
  34. 42
  35. 46
  36. 82
  37. 58
  38. 78
  39. 46
  40. 50

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