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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 518 · 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 91 =
  2. 2.Double 68 =
  3. 3.Double 23 =
  4. 4.Half of 152 =
  5. 5.Double 29 =
  6. 6.Half of 32 =
  7. 7.Half of 112 =
  8. 8.Double 16 =
  9. 9.Half of 76 =
  10. 10.Half of 92 =
  11. 11.Double 58 =
  12. 12.Half of 46 =
  13. 13.Double 28 =
  14. 14.Double 61 =
  15. 15.Half of 132 =
  16. 16.Double 49 =
  17. 17.Double 17 =
  18. 18.Double 95 =
  19. 19.Half of 52 =
  20. 20.Half of 104 =
  21. 21.Double 19 =
  22. 22.Half of 122 =
  23. 23.Half of 18 =
  24. 24.Double 36 =
  25. 25.Half of 148 =
  26. 26.Double 21 =
  27. 27.Half of 24 =
  28. 28.Half of 78 =
  29. 29.Double 74 =
  30. 30.Half of 26 =
  31. 31.Double 48 =
  32. 32.Half of 106 =
  33. 33.Double 26 =
  34. 34.Double 25 =
  35. 35.Half of 142 =
  36. 36.Double 65 =
  37. 37.Half of 186 =
  38. 38.Half of 162 =
  39. 39.Half of 82 =
  40. 40.Double 41 =

Answer key

  1. 182
  2. 136
  3. 46
  4. 76
  5. 58
  6. 16
  7. 56
  8. 32
  9. 38
  10. 46
  11. 116
  12. 23
  13. 56
  14. 122
  15. 66
  16. 98
  17. 34
  18. 190
  19. 26
  20. 52
  21. 38
  22. 61
  23. 9
  24. 72
  25. 74
  26. 42
  27. 12
  28. 39
  29. 148
  30. 13
  31. 96
  32. 53
  33. 52
  34. 50
  35. 71
  36. 130
  37. 93
  38. 81
  39. 41
  40. 82

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