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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 984 · 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 12 =
  2. 2.Half of 168 =
  3. 3.Double 18 =
  4. 4.Half of 126 =
  5. 5.Double 63 =
  6. 6.Double 97 =
  7. 7.Double 23 =
  8. 8.Double 26 =
  9. 9.Double 59 =
  10. 10.Half of 78 =
  11. 11.Double 65 =
  12. 12.Double 47 =
  13. 13.Half of 192 =
  14. 14.Double 14 =
  15. 15.Half of 38 =
  16. 16.Half of 42 =
  17. 17.Double 64 =
  18. 18.Double 95 =
  19. 19.Double 11 =
  20. 20.Double 75 =
  21. 21.Half of 84 =
  22. 22.Half of 174 =
  23. 23.Double 16 =
  24. 24.Double 91 =
  25. 25.Half of 162 =
  26. 26.Half of 108 =
  27. 27.Double 79 =
  28. 28.Double 77 =
  29. 29.Half of 128 =
  30. 30.Double 15 =
  31. 31.Double 32 =
  32. 32.Double 66 =
  33. 33.Double 61 =
  34. 34.Half of 58 =
  35. 35.Half of 16 =
  36. 36.Double 76 =
  37. 37.Half of 14 =
  38. 38.Double 51 =
  39. 39.Double 27 =
  40. 40.Double 81 =

Answer key

  1. 6
  2. 84
  3. 36
  4. 63
  5. 126
  6. 194
  7. 46
  8. 52
  9. 118
  10. 39
  11. 130
  12. 94
  13. 96
  14. 28
  15. 19
  16. 21
  17. 128
  18. 190
  19. 22
  20. 150
  21. 42
  22. 87
  23. 32
  24. 182
  25. 81
  26. 54
  27. 158
  28. 154
  29. 64
  30. 30
  31. 64
  32. 132
  33. 122
  34. 29
  35. 8
  36. 152
  37. 7
  38. 102
  39. 54
  40. 162

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