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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 858 · 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 53 =
  2. 2.Double 73 =
  3. 3.Half of 142 =
  4. 4.Double 47 =
  5. 5.Half of 52 =
  6. 6.Half of 108 =
  7. 7.Half of 82 =
  8. 8.Half of 62 =
  9. 9.Double 92 =
  10. 10.Half of 116 =
  11. 11.Half of 162 =
  12. 12.Double 19 =
  13. 13.Half of 182 =
  14. 14.Double 94 =
  15. 15.Half of 54 =
  16. 16.Half of 106 =
  17. 17.Half of 196 =
  18. 18.Half of 66 =
  19. 19.Half of 112 =
  20. 20.Double 56 =
  21. 21.Half of 34 =
  22. 22.Double 48 =
  23. 23.Double 81 =
  24. 24.Double 63 =
  25. 25.Half of 122 =
  26. 26.Double 32 =
  27. 27.Double 97 =
  28. 28.Half of 156 =
  29. 29.Half of 114 =
  30. 30.Half of 24 =
  31. 31.Half of 152 =
  32. 32.Double 87 =
  33. 33.Double 41 =
  34. 34.Half of 132 =
  35. 35.Double 31 =
  36. 36.Double 57 =
  37. 37.Half of 28 =
  38. 38.Half of 174 =
  39. 39.Double 99 =
  40. 40.Double 11 =

Answer key

  1. 106
  2. 146
  3. 71
  4. 94
  5. 26
  6. 54
  7. 41
  8. 31
  9. 184
  10. 58
  11. 81
  12. 38
  13. 91
  14. 188
  15. 27
  16. 53
  17. 98
  18. 33
  19. 56
  20. 112
  21. 17
  22. 96
  23. 162
  24. 126
  25. 61
  26. 64
  27. 194
  28. 78
  29. 57
  30. 12
  31. 76
  32. 174
  33. 82
  34. 66
  35. 62
  36. 114
  37. 14
  38. 87
  39. 198
  40. 22

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