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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 927 · 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.Half of 32 =
  3. 3.Double 23 =
  4. 4.Double 47 =
  5. 5.Double 39 =
  6. 6.Double 17 =
  7. 7.Half of 38 =
  8. 8.Half of 122 =
  9. 9.Double 58 =
  10. 10.Half of 146 =
  11. 11.Double 11 =
  12. 12.Double 12 =
  13. 13.Double 22 =
  14. 14.Half of 42 =
  15. 15.Half of 194 =
  16. 16.Double 25 =
  17. 17.Half of 82 =
  18. 18.Half of 184 =
  19. 19.Double 53 =
  20. 20.Half of 154 =
  21. 21.Double 27 =
  22. 22.Double 74 =
  23. 23.Half of 46 =
  24. 24.Double 82 =
  25. 25.Half of 18 =
  26. 26.Half of 116 =
  27. 27.Double 85 =
  28. 28.Half of 192 =
  29. 29.Half of 128 =
  30. 30.Half of 174 =
  31. 31.Half of 22 =
  32. 32.Half of 132 =
  33. 33.Half of 144 =
  34. 34.Half of 102 =
  35. 35.Half of 62 =
  36. 36.Half of 182 =
  37. 37.Half of 92 =
  38. 38.Double 33 =
  39. 39.Half of 48 =
  40. 40.Double 99 =

Answer key

  1. 172
  2. 16
  3. 46
  4. 94
  5. 78
  6. 34
  7. 19
  8. 61
  9. 116
  10. 73
  11. 22
  12. 24
  13. 44
  14. 21
  15. 97
  16. 50
  17. 41
  18. 92
  19. 106
  20. 77
  21. 54
  22. 148
  23. 23
  24. 164
  25. 9
  26. 58
  27. 170
  28. 96
  29. 64
  30. 87
  31. 11
  32. 66
  33. 72
  34. 51
  35. 31
  36. 91
  37. 46
  38. 66
  39. 24
  40. 198

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