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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 907 · 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 61 =
  2. 2.Half of 106 =
  3. 3.Half of 22 =
  4. 4.Double 28 =
  5. 5.Double 36 =
  6. 6.Double 31 =
  7. 7.Half of 62 =
  8. 8.Half of 38 =
  9. 9.Double 52 =
  10. 10.Double 78 =
  11. 11.Double 26 =
  12. 12.Double 49 =
  13. 13.Double 74 =
  14. 14.Double 51 =
  15. 15.Half of 174 =
  16. 16.Half of 66 =
  17. 17.Double 12 =
  18. 18.Double 11 =
  19. 19.Half of 82 =
  20. 20.Double 91 =
  21. 21.Half of 118 =
  22. 22.Half of 46 =
  23. 23.Half of 94 =
  24. 24.Double 32 =
  25. 25.Half of 112 =
  26. 26.Half of 104 =
  27. 27.Double 41 =
  28. 28.Double 35 =
  29. 29.Half of 116 =
  30. 30.Half of 124 =
  31. 31.Half of 146 =
  32. 32.Double 25 =
  33. 33.Double 66 =
  34. 34.Half of 142 =
  35. 35.Half of 166 =
  36. 36.Double 86 =
  37. 37.Double 24 =
  38. 38.Double 72 =
  39. 39.Double 96 =
  40. 40.Half of 122 =

Answer key

  1. 122
  2. 53
  3. 11
  4. 56
  5. 72
  6. 62
  7. 31
  8. 19
  9. 104
  10. 156
  11. 52
  12. 98
  13. 148
  14. 102
  15. 87
  16. 33
  17. 24
  18. 22
  19. 41
  20. 182
  21. 59
  22. 23
  23. 47
  24. 64
  25. 56
  26. 52
  27. 82
  28. 70
  29. 58
  30. 62
  31. 73
  32. 50
  33. 132
  34. 71
  35. 83
  36. 172
  37. 48
  38. 144
  39. 192
  40. 61

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