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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 295 · 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 178 =
  2. 2.Double 18 =
  3. 3.Double 81 =
  4. 4.Half of 98 =
  5. 5.Double 43 =
  6. 6.Double 19 =
  7. 7.Double 61 =
  8. 8.Half of 188 =
  9. 9.Half of 66 =
  10. 10.Half of 22 =
  11. 11.Double 58 =
  12. 12.Half of 162 =
  13. 13.Double 25 =
  14. 14.Double 16 =
  15. 15.Half of 86 =
  16. 16.Double 51 =
  17. 17.Half of 154 =
  18. 18.Half of 126 =
  19. 19.Double 49 =
  20. 20.Half of 172 =
  21. 21.Double 74 =
  22. 22.Half of 24 =
  23. 23.Double 63 =
  24. 24.Double 14 =
  25. 25.Half of 32 =
  26. 26.Double 41 =
  27. 27.Half of 152 =
  28. 28.Half of 194 =
  29. 29.Half of 144 =
  30. 30.Double 71 =
  31. 31.Half of 62 =
  32. 32.Half of 18 =
  33. 33.Double 27 =
  34. 34.Half of 36 =
  35. 35.Half of 112 =
  36. 36.Double 89 =
  37. 37.Half of 64 =
  38. 38.Double 33 =
  39. 39.Double 24 =
  40. 40.Half of 42 =

Answer key

  1. 89
  2. 36
  3. 162
  4. 49
  5. 86
  6. 38
  7. 122
  8. 94
  9. 33
  10. 11
  11. 116
  12. 81
  13. 50
  14. 32
  15. 43
  16. 102
  17. 77
  18. 63
  19. 98
  20. 86
  21. 148
  22. 12
  23. 126
  24. 28
  25. 16
  26. 82
  27. 76
  28. 97
  29. 72
  30. 142
  31. 31
  32. 9
  33. 54
  34. 18
  35. 56
  36. 178
  37. 32
  38. 66
  39. 48
  40. 21

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