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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 928 · 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 99 =
  2. 2.Double 89 =
  3. 3.Half of 164 =
  4. 4.Half of 72 =
  5. 5.Double 13 =
  6. 6.Half of 102 =
  7. 7.Half of 76 =
  8. 8.Double 37 =
  9. 9.Half of 64 =
  10. 10.Half of 132 =
  11. 11.Half of 154 =
  12. 12.Half of 128 =
  13. 13.Half of 124 =
  14. 14.Double 86 =
  15. 15.Double 43 =
  16. 16.Double 57 =
  17. 17.Half of 148 =
  18. 18.Double 61 =
  19. 19.Half of 174 =
  20. 20.Half of 62 =
  21. 21.Double 72 =
  22. 22.Half of 22 =
  23. 23.Double 32 =
  24. 24.Double 28 =
  25. 25.Half of 122 =
  26. 26.Double 65 =
  27. 27.Double 81 =
  28. 28.Half of 38 =
  29. 29.Double 55 =
  30. 30.Half of 178 =
  31. 31.Half of 158 =
  32. 32.Double 22 =
  33. 33.Double 71 =
  34. 34.Double 38 =
  35. 35.Double 24 =
  36. 36.Double 58 =
  37. 37.Half of 146 =
  38. 38.Half of 168 =
  39. 39.Double 62 =
  40. 40.Half of 142 =

Answer key

  1. 198
  2. 178
  3. 82
  4. 36
  5. 26
  6. 51
  7. 38
  8. 74
  9. 32
  10. 66
  11. 77
  12. 64
  13. 62
  14. 172
  15. 86
  16. 114
  17. 74
  18. 122
  19. 87
  20. 31
  21. 144
  22. 11
  23. 64
  24. 56
  25. 61
  26. 130
  27. 162
  28. 19
  29. 110
  30. 89
  31. 79
  32. 44
  33. 142
  34. 76
  35. 48
  36. 116
  37. 73
  38. 84
  39. 124
  40. 71

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