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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 944 · 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 24 =
  2. 2.Double 93 =
  3. 3.Double 84 =
  4. 4.Half of 142 =
  5. 5.Double 71 =
  6. 6.Double 42 =
  7. 7.Double 81 =
  8. 8.Double 92 =
  9. 9.Half of 162 =
  10. 10.Double 87 =
  11. 11.Double 31 =
  12. 12.Double 19 =
  13. 13.Half of 18 =
  14. 14.Half of 122 =
  15. 15.Double 15 =
  16. 16.Double 46 =
  17. 17.Half of 98 =
  18. 18.Double 37 =
  19. 19.Half of 156 =
  20. 20.Half of 172 =
  21. 21.Double 51 =
  22. 22.Half of 164 =
  23. 23.Half of 106 =
  24. 24.Half of 112 =
  25. 25.Double 79 =
  26. 26.Double 14 =
  27. 27.Half of 56 =
  28. 28.Double 56 =
  29. 29.Double 77 =
  30. 30.Half of 52 =
  31. 31.Half of 76 =
  32. 32.Half of 178 =
  33. 33.Half of 194 =
  34. 34.Half of 184 =
  35. 35.Double 78 =
  36. 36.Double 96 =
  37. 37.Double 29 =
  38. 38.Half of 42 =
  39. 39.Double 27 =
  40. 40.Half of 174 =

Answer key

  1. 48
  2. 186
  3. 168
  4. 71
  5. 142
  6. 84
  7. 162
  8. 184
  9. 81
  10. 174
  11. 62
  12. 38
  13. 9
  14. 61
  15. 30
  16. 92
  17. 49
  18. 74
  19. 78
  20. 86
  21. 102
  22. 82
  23. 53
  24. 56
  25. 158
  26. 28
  27. 28
  28. 112
  29. 154
  30. 26
  31. 38
  32. 89
  33. 97
  34. 92
  35. 156
  36. 192
  37. 58
  38. 21
  39. 54
  40. 87

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