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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 249 · 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 34 =
  2. 2.Half of 28 =
  3. 3.Double 61 =
  4. 4.Double 48 =
  5. 5.Double 65 =
  6. 6.Half of 132 =
  7. 7.Double 16 =
  8. 8.Double 31 =
  9. 9.Double 18 =
  10. 10.Double 89 =
  11. 11.Half of 198 =
  12. 12.Half of 134 =
  13. 13.Half of 142 =
  14. 14.Double 77 =
  15. 15.Half of 194 =
  16. 16.Double 93 =
  17. 17.Double 54 =
  18. 18.Double 24 =
  19. 19.Double 72 =
  20. 20.Double 53 =
  21. 21.Half of 22 =
  22. 22.Half of 78 =
  23. 23.Double 79 =
  24. 24.Double 73 =
  25. 25.Double 28 =
  26. 26.Half of 92 =
  27. 27.Double 12 =
  28. 28.Double 92 =
  29. 29.Half of 148 =
  30. 30.Half of 146 =
  31. 31.Half of 104 =
  32. 32.Double 88 =
  33. 33.Half of 64 =
  34. 34.Double 55 =
  35. 35.Half of 106 =
  36. 36.Double 27 =
  37. 37.Half of 62 =
  38. 38.Half of 136 =
  39. 39.Half of 94 =
  40. 40.Half of 46 =

Answer key

  1. 68
  2. 14
  3. 122
  4. 96
  5. 130
  6. 66
  7. 32
  8. 62
  9. 36
  10. 178
  11. 99
  12. 67
  13. 71
  14. 154
  15. 97
  16. 186
  17. 108
  18. 48
  19. 144
  20. 106
  21. 11
  22. 39
  23. 158
  24. 146
  25. 56
  26. 46
  27. 24
  28. 184
  29. 74
  30. 73
  31. 52
  32. 176
  33. 32
  34. 110
  35. 53
  36. 54
  37. 31
  38. 68
  39. 47
  40. 23

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