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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 989 · 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 86 =
  2. 2.Double 16 =
  3. 3.Double 15 =
  4. 4.Double 12 =
  5. 5.Double 53 =
  6. 6.Half of 104 =
  7. 7.Half of 162 =
  8. 8.Double 81 =
  9. 9.Double 31 =
  10. 10.Half of 182 =
  11. 11.Double 36 =
  12. 12.Half of 16 =
  13. 13.Double 41 =
  14. 14.Half of 142 =
  15. 15.Double 35 =
  16. 16.Double 76 =
  17. 17.Half of 96 =
  18. 18.Half of 186 =
  19. 19.Half of 194 =
  20. 20.Half of 164 =
  21. 21.Double 24 =
  22. 22.Double 37 =
  23. 23.Double 54 =
  24. 24.Half of 118 =
  25. 25.Half of 22 =
  26. 26.Double 14 =
  27. 27.Half of 192 =
  28. 28.Half of 64 =
  29. 29.Half of 82 =
  30. 30.Double 82 =
  31. 31.Double 61 =
  32. 32.Double 48 =
  33. 33.Half of 172 =
  34. 34.Half of 122 =
  35. 35.Double 92 =
  36. 36.Half of 126 =
  37. 37.Half of 116 =
  38. 38.Double 49 =
  39. 39.Double 88 =
  40. 40.Half of 136 =

Answer key

  1. 172
  2. 32
  3. 30
  4. 24
  5. 106
  6. 52
  7. 81
  8. 162
  9. 62
  10. 91
  11. 72
  12. 8
  13. 82
  14. 71
  15. 70
  16. 152
  17. 48
  18. 93
  19. 97
  20. 82
  21. 48
  22. 74
  23. 108
  24. 59
  25. 11
  26. 28
  27. 96
  28. 32
  29. 41
  30. 164
  31. 122
  32. 96
  33. 86
  34. 61
  35. 184
  36. 63
  37. 58
  38. 98
  39. 176
  40. 68

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