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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 311 · 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 198 =
  2. 2.Double 24 =
  3. 3.Half of 132 =
  4. 4.Double 22 =
  5. 5.Half of 86 =
  6. 6.Double 65 =
  7. 7.Double 96 =
  8. 8.Double 55 =
  9. 9.Double 16 =
  10. 10.Half of 142 =
  11. 11.Half of 122 =
  12. 12.Double 97 =
  13. 13.Double 49 =
  14. 14.Double 61 =
  15. 15.Double 81 =
  16. 16.Double 47 =
  17. 17.Double 59 =
  18. 18.Half of 44 =
  19. 19.Double 21 =
  20. 20.Half of 182 =
  21. 21.Half of 54 =
  22. 22.Double 76 =
  23. 23.Half of 166 =
  24. 24.Half of 196 =
  25. 25.Double 11 =
  26. 26.Double 31 =
  27. 27.Double 28 =
  28. 28.Double 57 =
  29. 29.Half of 18 =
  30. 30.Double 91 =
  31. 31.Half of 56 =
  32. 32.Half of 12 =
  33. 33.Half of 34 =
  34. 34.Half of 158 =
  35. 35.Double 41 =
  36. 36.Half of 66 =
  37. 37.Double 75 =
  38. 38.Half of 94 =
  39. 39.Half of 174 =
  40. 40.Double 15 =

Answer key

  1. 99
  2. 48
  3. 66
  4. 44
  5. 43
  6. 130
  7. 192
  8. 110
  9. 32
  10. 71
  11. 61
  12. 194
  13. 98
  14. 122
  15. 162
  16. 94
  17. 118
  18. 22
  19. 42
  20. 91
  21. 27
  22. 152
  23. 83
  24. 98
  25. 22
  26. 62
  27. 56
  28. 114
  29. 9
  30. 182
  31. 28
  32. 6
  33. 17
  34. 79
  35. 82
  36. 33
  37. 150
  38. 47
  39. 87
  40. 30

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