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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 720 · 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 132 =
  2. 2.Half of 94 =
  3. 3.Double 74 =
  4. 4.Double 64 =
  5. 5.Double 45 =
  6. 6.Half of 126 =
  7. 7.Half of 142 =
  8. 8.Double 14 =
  9. 9.Half of 18 =
  10. 10.Double 52 =
  11. 11.Half of 108 =
  12. 12.Double 49 =
  13. 13.Double 31 =
  14. 14.Double 57 =
  15. 15.Double 63 =
  16. 16.Half of 32 =
  17. 17.Double 15 =
  18. 18.Double 48 =
  19. 19.Half of 118 =
  20. 20.Half of 12 =
  21. 21.Half of 122 =
  22. 22.Half of 162 =
  23. 23.Double 56 =
  24. 24.Half of 44 =
  25. 25.Double 87 =
  26. 26.Double 32 =
  27. 27.Double 22 =
  28. 28.Double 27 =
  29. 29.Double 38 =
  30. 30.Half of 112 =
  31. 31.Double 47 =
  32. 32.Double 35 =
  33. 33.Double 44 =
  34. 34.Half of 184 =
  35. 35.Double 81 =
  36. 36.Double 23 =
  37. 37.Half of 98 =
  38. 38.Double 36 =
  39. 39.Double 71 =
  40. 40.Double 43 =

Answer key

  1. 66
  2. 47
  3. 148
  4. 128
  5. 90
  6. 63
  7. 71
  8. 28
  9. 9
  10. 104
  11. 54
  12. 98
  13. 62
  14. 114
  15. 126
  16. 16
  17. 30
  18. 96
  19. 59
  20. 6
  21. 61
  22. 81
  23. 112
  24. 22
  25. 174
  26. 64
  27. 44
  28. 54
  29. 76
  30. 56
  31. 94
  32. 70
  33. 88
  34. 92
  35. 162
  36. 46
  37. 49
  38. 72
  39. 142
  40. 86

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