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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 948 · 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 158 =
  2. 2.Half of 18 =
  3. 3.Double 81 =
  4. 4.Half of 12 =
  5. 5.Double 16 =
  6. 6.Double 17 =
  7. 7.Half of 106 =
  8. 8.Double 86 =
  9. 9.Half of 152 =
  10. 10.Double 36 =
  11. 11.Double 27 =
  12. 12.Double 91 =
  13. 13.Double 51 =
  14. 14.Double 22 =
  15. 15.Double 53 =
  16. 16.Half of 52 =
  17. 17.Double 47 =
  18. 18.Double 69 =
  19. 19.Double 93 =
  20. 20.Double 19 =
  21. 21.Half of 82 =
  22. 22.Double 64 =
  23. 23.Half of 102 =
  24. 24.Double 57 =
  25. 25.Double 99 =
  26. 26.Half of 178 =
  27. 27.Half of 42 =
  28. 28.Double 31 =
  29. 29.Half of 146 =
  30. 30.Half of 154 =
  31. 31.Double 21 =
  32. 32.Half of 142 =
  33. 33.Double 78 =
  34. 34.Double 41 =
  35. 35.Double 97 =
  36. 36.Half of 28 =
  37. 37.Double 24 =
  38. 38.Double 65 =
  39. 39.Double 72 =
  40. 40.Double 66 =

Answer key

  1. 79
  2. 9
  3. 162
  4. 6
  5. 32
  6. 34
  7. 53
  8. 172
  9. 76
  10. 72
  11. 54
  12. 182
  13. 102
  14. 44
  15. 106
  16. 26
  17. 94
  18. 138
  19. 186
  20. 38
  21. 41
  22. 128
  23. 51
  24. 114
  25. 198
  26. 89
  27. 21
  28. 62
  29. 73
  30. 77
  31. 42
  32. 71
  33. 156
  34. 82
  35. 194
  36. 14
  37. 48
  38. 130
  39. 144
  40. 132

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