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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 969 · 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 53 =
  3. 3.Double 57 =
  4. 4.Half of 162 =
  5. 5.Half of 32 =
  6. 6.Double 19 =
  7. 7.Double 38 =
  8. 8.Half of 62 =
  9. 9.Double 54 =
  10. 10.Half of 14 =
  11. 11.Double 72 =
  12. 12.Double 73 =
  13. 13.Double 98 =
  14. 14.Double 71 =
  15. 15.Half of 192 =
  16. 16.Half of 76 =
  17. 17.Half of 74 =
  18. 18.Half of 54 =
  19. 19.Half of 144 =
  20. 20.Double 91 =
  21. 21.Half of 52 =
  22. 22.Half of 82 =
  23. 23.Double 11 =
  24. 24.Half of 24 =
  25. 25.Double 89 =
  26. 26.Half of 132 =
  27. 27.Double 29 =
  28. 28.Half of 122 =
  29. 29.Half of 158 =
  30. 30.Half of 164 =
  31. 31.Double 61 =
  32. 32.Double 62 =
  33. 33.Double 46 =
  34. 34.Half of 22 =
  35. 35.Half of 46 =
  36. 36.Double 55 =
  37. 37.Double 74 =
  38. 38.Double 26 =
  39. 39.Half of 72 =
  40. 40.Half of 58 =

Answer key

  1. 198
  2. 106
  3. 114
  4. 81
  5. 16
  6. 38
  7. 76
  8. 31
  9. 108
  10. 7
  11. 144
  12. 146
  13. 196
  14. 142
  15. 96
  16. 38
  17. 37
  18. 27
  19. 72
  20. 182
  21. 26
  22. 41
  23. 22
  24. 12
  25. 178
  26. 66
  27. 58
  28. 61
  29. 79
  30. 82
  31. 122
  32. 124
  33. 92
  34. 11
  35. 23
  36. 110
  37. 148
  38. 52
  39. 36
  40. 29

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