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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 854 · 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 47 =
  2. 2.Double 44 =
  3. 3.Double 39 =
  4. 4.Double 42 =
  5. 5.Double 27 =
  6. 6.Double 14 =
  7. 7.Double 94 =
  8. 8.Double 21 =
  9. 9.Half of 94 =
  10. 10.Half of 182 =
  11. 11.Half of 82 =
  12. 12.Double 53 =
  13. 13.Double 38 =
  14. 14.Double 78 =
  15. 15.Double 79 =
  16. 16.Double 24 =
  17. 17.Half of 28 =
  18. 18.Half of 42 =
  19. 19.Double 16 =
  20. 20.Half of 54 =
  21. 21.Double 12 =
  22. 22.Double 92 =
  23. 23.Half of 154 =
  24. 24.Double 65 =
  25. 25.Half of 164 =
  26. 26.Double 99 =
  27. 27.Double 81 =
  28. 28.Double 77 =
  29. 29.Double 72 =
  30. 30.Double 62 =
  31. 31.Half of 36 =
  32. 32.Half of 108 =
  33. 33.Half of 38 =
  34. 34.Double 45 =
  35. 35.Double 55 =
  36. 36.Half of 122 =
  37. 37.Double 32 =
  38. 38.Double 63 =
  39. 39.Half of 16 =
  40. 40.Half of 162 =

Answer key

  1. 94
  2. 88
  3. 78
  4. 84
  5. 54
  6. 28
  7. 188
  8. 42
  9. 47
  10. 91
  11. 41
  12. 106
  13. 76
  14. 156
  15. 158
  16. 48
  17. 14
  18. 21
  19. 32
  20. 27
  21. 24
  22. 184
  23. 77
  24. 130
  25. 82
  26. 198
  27. 162
  28. 154
  29. 144
  30. 124
  31. 18
  32. 54
  33. 19
  34. 90
  35. 110
  36. 61
  37. 64
  38. 126
  39. 8
  40. 81

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