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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 875 · 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.Half of 92 =
  2. 2.Half of 168 =
  3. 3.Double 71 =
  4. 4.Half of 154 =
  5. 5.Double 85 =
  6. 6.Double 29 =
  7. 7.Double 17 =
  8. 8.Double 11 =
  9. 9.Double 14 =
  10. 10.Half of 28 =
  11. 11.Half of 76 =
  12. 12.Double 44 =
  13. 13.Half of 94 =
  14. 14.Double 21 =
  15. 15.Half of 98 =
  16. 16.Double 82 =
  17. 17.Double 76 =
  18. 18.Double 43 =
  19. 19.Half of 22 =
  20. 20.Double 49 =
  21. 21.Half of 62 =
  22. 22.Double 53 =
  23. 23.Half of 52 =
  24. 24.Double 78 =
  25. 25.Half of 104 =
  26. 26.Double 19 =
  27. 27.Double 31 =
  28. 28.Double 95 =
  29. 29.Double 91 =
  30. 30.Half of 192 =
  31. 31.Half of 188 =
  32. 32.Double 64 =
  33. 33.Half of 112 =
  34. 34.Half of 26 =
  35. 35.Half of 178 =
  36. 36.Half of 16 =
  37. 37.Double 65 =
  38. 38.Half of 32 =
  39. 39.Double 46 =
  40. 40.Double 79 =

Answer key

  1. 46
  2. 84
  3. 142
  4. 77
  5. 170
  6. 58
  7. 34
  8. 22
  9. 28
  10. 14
  11. 38
  12. 88
  13. 47
  14. 42
  15. 49
  16. 164
  17. 152
  18. 86
  19. 11
  20. 98
  21. 31
  22. 106
  23. 26
  24. 156
  25. 52
  26. 38
  27. 62
  28. 190
  29. 182
  30. 96
  31. 94
  32. 128
  33. 56
  34. 13
  35. 89
  36. 8
  37. 130
  38. 16
  39. 92
  40. 158

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