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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 983 · 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 17 =
  2. 2.Double 54 =
  3. 3.Half of 58 =
  4. 4.Half of 122 =
  5. 5.Double 97 =
  6. 6.Half of 148 =
  7. 7.Double 31 =
  8. 8.Double 81 =
  9. 9.Double 72 =
  10. 10.Double 56 =
  11. 11.Half of 66 =
  12. 12.Half of 106 =
  13. 13.Double 19 =
  14. 14.Double 18 =
  15. 15.Half of 76 =
  16. 16.Half of 134 =
  17. 17.Double 51 =
  18. 18.Double 22 =
  19. 19.Half of 32 =
  20. 20.Double 48 =
  21. 21.Double 14 =
  22. 22.Half of 184 =
  23. 23.Half of 72 =
  24. 24.Double 45 =
  25. 25.Half of 178 =
  26. 26.Half of 42 =
  27. 27.Double 66 =
  28. 28.Half of 138 =
  29. 29.Half of 12 =
  30. 30.Double 86 =
  31. 31.Double 58 =
  32. 32.Double 11 =
  33. 33.Half of 108 =
  34. 34.Half of 68 =
  35. 35.Half of 172 =
  36. 36.Half of 132 =
  37. 37.Double 28 =
  38. 38.Half of 192 =
  39. 39.Double 73 =
  40. 40.Half of 112 =

Answer key

  1. 34
  2. 108
  3. 29
  4. 61
  5. 194
  6. 74
  7. 62
  8. 162
  9. 144
  10. 112
  11. 33
  12. 53
  13. 38
  14. 36
  15. 38
  16. 67
  17. 102
  18. 44
  19. 16
  20. 96
  21. 28
  22. 92
  23. 36
  24. 90
  25. 89
  26. 21
  27. 132
  28. 69
  29. 6
  30. 172
  31. 116
  32. 22
  33. 54
  34. 34
  35. 86
  36. 66
  37. 56
  38. 96
  39. 146
  40. 56

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