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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 881 · 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 25 =
  2. 2.Half of 128 =
  3. 3.Half of 104 =
  4. 4.Half of 72 =
  5. 5.Double 82 =
  6. 6.Half of 164 =
  7. 7.Double 89 =
  8. 8.Half of 76 =
  9. 9.Double 17 =
  10. 10.Double 75 =
  11. 11.Half of 166 =
  12. 12.Double 72 =
  13. 13.Double 95 =
  14. 14.Double 56 =
  15. 15.Double 77 =
  16. 16.Half of 88 =
  17. 17.Half of 44 =
  18. 18.Double 43 =
  19. 19.Double 78 =
  20. 20.Double 85 =
  21. 21.Half of 68 =
  22. 22.Half of 172 =
  23. 23.Half of 124 =
  24. 24.Double 35 =
  25. 25.Half of 116 =
  26. 26.Double 26 =
  27. 27.Double 92 =
  28. 28.Double 38 =
  29. 29.Double 97 =
  30. 30.Half of 192 =
  31. 31.Half of 38 =
  32. 32.Double 23 =
  33. 33.Half of 32 =
  34. 34.Half of 152 =
  35. 35.Double 66 =
  36. 36.Half of 22 =
  37. 37.Double 54 =
  38. 38.Double 71 =
  39. 39.Double 88 =
  40. 40.Double 81 =

Answer key

  1. 50
  2. 64
  3. 52
  4. 36
  5. 164
  6. 82
  7. 178
  8. 38
  9. 34
  10. 150
  11. 83
  12. 144
  13. 190
  14. 112
  15. 154
  16. 44
  17. 22
  18. 86
  19. 156
  20. 170
  21. 34
  22. 86
  23. 62
  24. 70
  25. 58
  26. 52
  27. 184
  28. 76
  29. 194
  30. 96
  31. 19
  32. 46
  33. 16
  34. 76
  35. 132
  36. 11
  37. 108
  38. 142
  39. 176
  40. 162

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