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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 991 · 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 164 =
  2. 2.Double 88 =
  3. 3.Half of 106 =
  4. 4.Half of 148 =
  5. 5.Half of 152 =
  6. 6.Half of 48 =
  7. 7.Half of 62 =
  8. 8.Half of 22 =
  9. 9.Half of 36 =
  10. 10.Half of 124 =
  11. 11.Half of 142 =
  12. 12.Half of 134 =
  13. 13.Double 24 =
  14. 14.Double 71 =
  15. 15.Half of 176 =
  16. 16.Half of 136 =
  17. 17.Half of 28 =
  18. 18.Double 89 =
  19. 19.Double 81 =
  20. 20.Half of 46 =
  21. 21.Double 18 =
  22. 22.Double 83 =
  23. 23.Double 21 =
  24. 24.Half of 132 =
  25. 25.Double 91 =
  26. 26.Half of 24 =
  27. 27.Double 61 =
  28. 28.Double 79 =
  29. 29.Double 35 =
  30. 30.Double 31 =
  31. 31.Double 29 =
  32. 32.Half of 92 =
  33. 33.Half of 166 =
  34. 34.Double 41 =
  35. 35.Double 68 =
  36. 36.Double 74 =
  37. 37.Double 26 =
  38. 38.Half of 68 =
  39. 39.Double 33 =
  40. 40.Double 85 =

Answer key

  1. 82
  2. 176
  3. 53
  4. 74
  5. 76
  6. 24
  7. 31
  8. 11
  9. 18
  10. 62
  11. 71
  12. 67
  13. 48
  14. 142
  15. 88
  16. 68
  17. 14
  18. 178
  19. 162
  20. 23
  21. 36
  22. 166
  23. 42
  24. 66
  25. 182
  26. 12
  27. 122
  28. 158
  29. 70
  30. 62
  31. 58
  32. 46
  33. 83
  34. 82
  35. 136
  36. 148
  37. 52
  38. 34
  39. 66
  40. 170

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