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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 903 · 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 26 =
  2. 2.Double 72 =
  3. 3.Double 99 =
  4. 4.Half of 172 =
  5. 5.Double 27 =
  6. 6.Double 21 =
  7. 7.Double 96 =
  8. 8.Double 83 =
  9. 9.Half of 48 =
  10. 10.Half of 136 =
  11. 11.Double 11 =
  12. 12.Double 31 =
  13. 13.Half of 144 =
  14. 14.Double 28 =
  15. 15.Double 44 =
  16. 16.Half of 182 =
  17. 17.Half of 194 =
  18. 18.Double 61 =
  19. 19.Double 38 =
  20. 20.Double 88 =
  21. 21.Half of 46 =
  22. 22.Half of 98 =
  23. 23.Double 15 =
  24. 24.Half of 78 =
  25. 25.Half of 74 =
  26. 26.Double 32 =
  27. 27.Double 53 =
  28. 28.Double 91 =
  29. 29.Half of 198 =
  30. 30.Double 29 =
  31. 31.Half of 14 =
  32. 32.Double 17 =
  33. 33.Double 35 =
  34. 34.Half of 176 =
  35. 35.Half of 174 =
  36. 36.Half of 108 =
  37. 37.Double 43 =
  38. 38.Half of 132 =
  39. 39.Double 49 =
  40. 40.Half of 28 =

Answer key

  1. 52
  2. 144
  3. 198
  4. 86
  5. 54
  6. 42
  7. 192
  8. 166
  9. 24
  10. 68
  11. 22
  12. 62
  13. 72
  14. 56
  15. 88
  16. 91
  17. 97
  18. 122
  19. 76
  20. 176
  21. 23
  22. 49
  23. 30
  24. 39
  25. 37
  26. 64
  27. 106
  28. 182
  29. 99
  30. 58
  31. 7
  32. 34
  33. 70
  34. 88
  35. 87
  36. 54
  37. 86
  38. 66
  39. 98
  40. 14

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