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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 818 · 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 33 =
  2. 2.Double 83 =
  3. 3.Half of 194 =
  4. 4.Double 17 =
  5. 5.Double 94 =
  6. 6.Double 29 =
  7. 7.Double 77 =
  8. 8.Half of 36 =
  9. 9.Double 99 =
  10. 10.Double 46 =
  11. 11.Double 26 =
  12. 12.Half of 172 =
  13. 13.Double 35 =
  14. 14.Half of 58 =
  15. 15.Half of 28 =
  16. 16.Half of 112 =
  17. 17.Half of 66 =
  18. 18.Half of 12 =
  19. 19.Half of 92 =
  20. 20.Double 13 =
  21. 21.Double 61 =
  22. 22.Half of 26 =
  23. 23.Half of 32 =
  24. 24.Double 91 =
  25. 25.Double 15 =
  26. 26.Half of 48 =
  27. 27.Half of 42 =
  28. 28.Half of 176 =
  29. 29.Half of 162 =
  30. 30.Double 21 =
  31. 31.Double 81 =
  32. 32.Half of 84 =
  33. 33.Half of 152 =
  34. 34.Half of 74 =
  35. 35.Double 71 =
  36. 36.Double 64 =
  37. 37.Half of 16 =
  38. 38.Double 79 =
  39. 39.Double 37 =
  40. 40.Half of 124 =

Answer key

  1. 66
  2. 166
  3. 97
  4. 34
  5. 188
  6. 58
  7. 154
  8. 18
  9. 198
  10. 92
  11. 52
  12. 86
  13. 70
  14. 29
  15. 14
  16. 56
  17. 33
  18. 6
  19. 46
  20. 26
  21. 122
  22. 13
  23. 16
  24. 182
  25. 30
  26. 24
  27. 21
  28. 88
  29. 81
  30. 42
  31. 162
  32. 42
  33. 76
  34. 37
  35. 142
  36. 128
  37. 8
  38. 158
  39. 74
  40. 62

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