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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 594 · 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 64 =
  2. 2.Double 77 =
  3. 3.Half of 144 =
  4. 4.Double 89 =
  5. 5.Half of 48 =
  6. 6.Double 92 =
  7. 7.Double 87 =
  8. 8.Half of 116 =
  9. 9.Half of 78 =
  10. 10.Double 34 =
  11. 11.Double 36 =
  12. 12.Half of 102 =
  13. 13.Double 95 =
  14. 14.Half of 136 =
  15. 15.Double 61 =
  16. 16.Double 15 =
  17. 17.Half of 98 =
  18. 18.Double 98 =
  19. 19.Half of 54 =
  20. 20.Double 16 =
  21. 21.Double 65 =
  22. 22.Double 71 =
  23. 23.Double 17 =
  24. 24.Half of 92 =
  25. 25.Double 51 =
  26. 26.Double 73 =
  27. 27.Double 19 =
  28. 28.Double 41 =
  29. 29.Double 42 =
  30. 30.Half of 154 =
  31. 31.Double 38 =
  32. 32.Double 21 =
  33. 33.Half of 28 =
  34. 34.Double 78 =
  35. 35.Half of 12 =
  36. 36.Double 31 =
  37. 37.Double 84 =
  38. 38.Half of 126 =
  39. 39.Half of 196 =
  40. 40.Double 62 =

Answer key

  1. 128
  2. 154
  3. 72
  4. 178
  5. 24
  6. 184
  7. 174
  8. 58
  9. 39
  10. 68
  11. 72
  12. 51
  13. 190
  14. 68
  15. 122
  16. 30
  17. 49
  18. 196
  19. 27
  20. 32
  21. 130
  22. 142
  23. 34
  24. 46
  25. 102
  26. 146
  27. 38
  28. 82
  29. 84
  30. 77
  31. 76
  32. 42
  33. 14
  34. 156
  35. 6
  36. 62
  37. 168
  38. 63
  39. 98
  40. 124

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