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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 886 · 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 61 =
  3. 3.Half of 144 =
  4. 4.Double 91 =
  5. 5.Half of 182 =
  6. 6.Half of 132 =
  7. 7.Half of 36 =
  8. 8.Double 37 =
  9. 9.Half of 188 =
  10. 10.Half of 74 =
  11. 11.Half of 122 =
  12. 12.Double 25 =
  13. 13.Double 29 =
  14. 14.Double 34 =
  15. 15.Half of 42 =
  16. 16.Double 17 =
  17. 17.Half of 84 =
  18. 18.Half of 52 =
  19. 19.Half of 72 =
  20. 20.Half of 86 =
  21. 21.Double 39 =
  22. 22.Double 78 =
  23. 23.Half of 16 =
  24. 24.Half of 102 =
  25. 25.Half of 112 =
  26. 26.Double 45 =
  27. 27.Double 58 =
  28. 28.Half of 22 =
  29. 29.Double 15 =
  30. 30.Half of 44 =
  31. 31.Double 26 =
  32. 32.Half of 168 =
  33. 33.Half of 164 =
  34. 34.Double 93 =
  35. 35.Double 92 =
  36. 36.Half of 32 =
  37. 37.Half of 172 =
  38. 38.Double 22 =
  39. 39.Half of 162 =
  40. 40.Half of 152 =

Answer key

  1. 48
  2. 122
  3. 72
  4. 182
  5. 91
  6. 66
  7. 18
  8. 74
  9. 94
  10. 37
  11. 61
  12. 50
  13. 58
  14. 68
  15. 21
  16. 34
  17. 42
  18. 26
  19. 36
  20. 43
  21. 78
  22. 156
  23. 8
  24. 51
  25. 56
  26. 90
  27. 116
  28. 11
  29. 30
  30. 22
  31. 52
  32. 84
  33. 82
  34. 186
  35. 184
  36. 16
  37. 86
  38. 44
  39. 81
  40. 76

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