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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 563 · 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.Half of 78 =
  2. 2.Half of 82 =
  3. 3.Half of 164 =
  4. 4.Half of 124 =
  5. 5.Half of 22 =
  6. 6.Double 68 =
  7. 7.Double 19 =
  8. 8.Half of 88 =
  9. 9.Double 41 =
  10. 10.Half of 36 =
  11. 11.Half of 58 =
  12. 12.Half of 66 =
  13. 13.Half of 86 =
  14. 14.Half of 18 =
  15. 15.Double 28 =
  16. 16.Double 73 =
  17. 17.Half of 48 =
  18. 18.Double 29 =
  19. 19.Half of 102 =
  20. 20.Double 67 =
  21. 21.Double 74 =
  22. 22.Double 34 =
  23. 23.Half of 76 =
  24. 24.Double 79 =
  25. 25.Double 17 =
  26. 26.Double 15 =
  27. 27.Half of 26 =
  28. 28.Half of 64 =
  29. 29.Double 31 =
  30. 30.Half of 156 =
  31. 31.Double 14 =
  32. 32.Half of 172 =
  33. 33.Double 43 =
  34. 34.Half of 148 =
  35. 35.Double 72 =
  36. 36.Double 89 =
  37. 37.Half of 14 =
  38. 38.Half of 188 =
  39. 39.Half of 62 =
  40. 40.Double 26 =

Answer key

  1. 39
  2. 41
  3. 82
  4. 62
  5. 11
  6. 136
  7. 38
  8. 44
  9. 82
  10. 18
  11. 29
  12. 33
  13. 43
  14. 9
  15. 56
  16. 146
  17. 24
  18. 58
  19. 51
  20. 134
  21. 148
  22. 68
  23. 38
  24. 158
  25. 34
  26. 30
  27. 13
  28. 32
  29. 62
  30. 78
  31. 28
  32. 86
  33. 86
  34. 74
  35. 144
  36. 178
  37. 7
  38. 94
  39. 31
  40. 52

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