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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 474 · 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 174 =
  2. 2.Half of 146 =
  3. 3.Double 18 =
  4. 4.Double 23 =
  5. 5.Double 79 =
  6. 6.Double 64 =
  7. 7.Double 21 =
  8. 8.Half of 32 =
  9. 9.Double 94 =
  10. 10.Half of 112 =
  11. 11.Half of 92 =
  12. 12.Double 17 =
  13. 13.Half of 108 =
  14. 14.Double 92 =
  15. 15.Half of 16 =
  16. 16.Double 31 =
  17. 17.Double 74 =
  18. 18.Half of 22 =
  19. 19.Half of 148 =
  20. 20.Half of 152 =
  21. 21.Half of 154 =
  22. 22.Double 37 =
  23. 23.Double 82 =
  24. 24.Double 89 =
  25. 25.Double 95 =
  26. 26.Half of 114 =
  27. 27.Half of 68 =
  28. 28.Double 19 =
  29. 29.Double 12 =
  30. 30.Half of 88 =
  31. 31.Double 32 =
  32. 32.Half of 82 =
  33. 33.Half of 144 =
  34. 34.Double 54 =
  35. 35.Double 27 =
  36. 36.Half of 12 =
  37. 37.Half of 138 =
  38. 38.Double 16 =
  39. 39.Half of 98 =
  40. 40.Double 71 =

Answer key

  1. 87
  2. 73
  3. 36
  4. 46
  5. 158
  6. 128
  7. 42
  8. 16
  9. 188
  10. 56
  11. 46
  12. 34
  13. 54
  14. 184
  15. 8
  16. 62
  17. 148
  18. 11
  19. 74
  20. 76
  21. 77
  22. 74
  23. 164
  24. 178
  25. 190
  26. 57
  27. 34
  28. 38
  29. 24
  30. 44
  31. 64
  32. 41
  33. 72
  34. 108
  35. 54
  36. 6
  37. 69
  38. 32
  39. 49
  40. 142

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