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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 458 · 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 81 =
  2. 2.Double 77 =
  3. 3.Double 94 =
  4. 4.Half of 96 =
  5. 5.Double 15 =
  6. 6.Half of 116 =
  7. 7.Half of 132 =
  8. 8.Half of 172 =
  9. 9.Double 25 =
  10. 10.Half of 144 =
  11. 11.Double 74 =
  12. 12.Half of 34 =
  13. 13.Double 75 =
  14. 14.Double 91 =
  15. 15.Half of 16 =
  16. 16.Double 73 =
  17. 17.Double 83 =
  18. 18.Half of 62 =
  19. 19.Double 65 =
  20. 20.Double 28 =
  21. 21.Double 31 =
  22. 22.Half of 92 =
  23. 23.Double 93 =
  24. 24.Half of 94 =
  25. 25.Half of 104 =
  26. 26.Double 47 =
  27. 27.Double 97 =
  28. 28.Half of 176 =
  29. 29.Half of 18 =
  30. 30.Half of 52 =
  31. 31.Double 58 =
  32. 32.Half of 54 =
  33. 33.Double 35 =
  34. 34.Double 34 =
  35. 35.Half of 158 =
  36. 36.Double 21 =
  37. 37.Half of 112 =
  38. 38.Half of 198 =
  39. 39.Half of 164 =
  40. 40.Half of 48 =

Answer key

  1. 162
  2. 154
  3. 188
  4. 48
  5. 30
  6. 58
  7. 66
  8. 86
  9. 50
  10. 72
  11. 148
  12. 17
  13. 150
  14. 182
  15. 8
  16. 146
  17. 166
  18. 31
  19. 130
  20. 56
  21. 62
  22. 46
  23. 186
  24. 47
  25. 52
  26. 94
  27. 194
  28. 88
  29. 9
  30. 26
  31. 116
  32. 27
  33. 70
  34. 68
  35. 79
  36. 42
  37. 56
  38. 99
  39. 82
  40. 24

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