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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 880 · 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 81 =
  2. 2.Double 42 =
  3. 3.Double 29 =
  4. 4.Half of 164 =
  5. 5.Double 55 =
  6. 6.Half of 162 =
  7. 7.Half of 46 =
  8. 8.Double 11 =
  9. 9.Double 41 =
  10. 10.Double 28 =
  11. 11.Half of 114 =
  12. 12.Double 15 =
  13. 13.Half of 38 =
  14. 14.Double 61 =
  15. 15.Half of 174 =
  16. 16.Half of 152 =
  17. 17.Half of 188 =
  18. 18.Double 87 =
  19. 19.Half of 58 =
  20. 20.Double 14 =
  21. 21.Double 56 =
  22. 22.Double 99 =
  23. 23.Double 93 =
  24. 24.Half of 182 =
  25. 25.Half of 172 =
  26. 26.Double 97 =
  27. 27.Double 12 =
  28. 28.Half of 158 =
  29. 29.Double 21 =
  30. 30.Double 51 =
  31. 31.Double 31 =
  32. 32.Double 25 =
  33. 33.Half of 112 =
  34. 34.Half of 32 =
  35. 35.Half of 62 =
  36. 36.Double 38 =
  37. 37.Double 76 =
  38. 38.Double 48 =
  39. 39.Half of 126 =
  40. 40.Half of 96 =

Answer key

  1. 162
  2. 84
  3. 58
  4. 82
  5. 110
  6. 81
  7. 23
  8. 22
  9. 82
  10. 56
  11. 57
  12. 30
  13. 19
  14. 122
  15. 87
  16. 76
  17. 94
  18. 174
  19. 29
  20. 28
  21. 112
  22. 198
  23. 186
  24. 91
  25. 86
  26. 194
  27. 24
  28. 79
  29. 42
  30. 102
  31. 62
  32. 50
  33. 56
  34. 16
  35. 31
  36. 76
  37. 152
  38. 96
  39. 63
  40. 48

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