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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 933 · 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 88 =
  2. 2.Double 95 =
  3. 3.Half of 32 =
  4. 4.Double 19 =
  5. 5.Double 41 =
  6. 6.Double 42 =
  7. 7.Half of 16 =
  8. 8.Half of 26 =
  9. 9.Half of 158 =
  10. 10.Double 25 =
  11. 11.Half of 192 =
  12. 12.Half of 118 =
  13. 13.Double 29 =
  14. 14.Double 37 =
  15. 15.Half of 82 =
  16. 16.Double 31 =
  17. 17.Half of 132 =
  18. 18.Double 21 =
  19. 19.Double 81 =
  20. 20.Double 67 =
  21. 21.Half of 22 =
  22. 22.Half of 182 =
  23. 23.Double 91 =
  24. 24.Half of 142 =
  25. 25.Half of 86 =
  26. 26.Double 15 =
  27. 27.Double 14 =
  28. 28.Half of 106 =
  29. 29.Double 87 =
  30. 30.Half of 146 =
  31. 31.Double 18 =
  32. 32.Half of 94 =
  33. 33.Half of 14 =
  34. 34.Half of 184 =
  35. 35.Double 61 =
  36. 36.Double 64 =
  37. 37.Double 53 =
  38. 38.Half of 28 =
  39. 39.Double 59 =
  40. 40.Half of 52 =

Answer key

  1. 176
  2. 190
  3. 16
  4. 38
  5. 82
  6. 84
  7. 8
  8. 13
  9. 79
  10. 50
  11. 96
  12. 59
  13. 58
  14. 74
  15. 41
  16. 62
  17. 66
  18. 42
  19. 162
  20. 134
  21. 11
  22. 91
  23. 182
  24. 71
  25. 43
  26. 30
  27. 28
  28. 53
  29. 174
  30. 73
  31. 36
  32. 47
  33. 7
  34. 92
  35. 122
  36. 128
  37. 106
  38. 14
  39. 118
  40. 26

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