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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 433 · 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.Half of 92 =
  3. 3.Double 16 =
  4. 4.Double 56 =
  5. 5.Double 49 =
  6. 6.Half of 44 =
  7. 7.Double 72 =
  8. 8.Half of 184 =
  9. 9.Double 25 =
  10. 10.Double 36 =
  11. 11.Double 77 =
  12. 12.Double 61 =
  13. 13.Half of 56 =
  14. 14.Double 52 =
  15. 15.Double 44 =
  16. 16.Half of 72 =
  17. 17.Double 41 =
  18. 18.Double 98 =
  19. 19.Double 93 =
  20. 20.Double 33 =
  21. 21.Double 32 =
  22. 22.Double 58 =
  23. 23.Half of 104 =
  24. 24.Double 68 =
  25. 25.Half of 134 =
  26. 26.Half of 52 =
  27. 27.Double 87 =
  28. 28.Double 71 =
  29. 29.Double 45 =
  30. 30.Double 53 =
  31. 31.Double 85 =
  32. 32.Double 26 =
  33. 33.Double 42 =
  34. 34.Half of 178 =
  35. 35.Half of 12 =
  36. 36.Half of 42 =
  37. 37.Half of 118 =
  38. 38.Double 13 =
  39. 39.Half of 176 =
  40. 40.Double 14 =

Answer key

  1. 162
  2. 46
  3. 32
  4. 112
  5. 98
  6. 22
  7. 144
  8. 92
  9. 50
  10. 72
  11. 154
  12. 122
  13. 28
  14. 104
  15. 88
  16. 36
  17. 82
  18. 196
  19. 186
  20. 66
  21. 64
  22. 116
  23. 52
  24. 136
  25. 67
  26. 26
  27. 174
  28. 142
  29. 90
  30. 106
  31. 170
  32. 52
  33. 84
  34. 89
  35. 6
  36. 21
  37. 59
  38. 26
  39. 88
  40. 28

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