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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 994 · 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 62 =
  2. 2.Double 44 =
  3. 3.Half of 166 =
  4. 4.Double 61 =
  5. 5.Double 94 =
  6. 6.Double 78 =
  7. 7.Half of 96 =
  8. 8.Half of 192 =
  9. 9.Half of 18 =
  10. 10.Double 19 =
  11. 11.Half of 102 =
  12. 12.Double 35 =
  13. 13.Double 31 =
  14. 14.Half of 124 =
  15. 15.Double 77 =
  16. 16.Half of 196 =
  17. 17.Half of 184 =
  18. 18.Double 91 =
  19. 19.Double 98 =
  20. 20.Half of 42 =
  21. 21.Double 65 =
  22. 22.Half of 64 =
  23. 23.Double 21 =
  24. 24.Half of 106 =
  25. 25.Double 29 =
  26. 26.Half of 154 =
  27. 27.Double 18 =
  28. 28.Half of 82 =
  29. 29.Half of 112 =
  30. 30.Half of 28 =
  31. 31.Double 81 =
  32. 32.Double 69 =
  33. 33.Half of 132 =
  34. 34.Double 36 =
  35. 35.Double 71 =
  36. 36.Double 16 =
  37. 37.Double 37 =
  38. 38.Double 11 =
  39. 39.Double 25 =
  40. 40.Double 47 =

Answer key

  1. 31
  2. 88
  3. 83
  4. 122
  5. 188
  6. 156
  7. 48
  8. 96
  9. 9
  10. 38
  11. 51
  12. 70
  13. 62
  14. 62
  15. 154
  16. 98
  17. 92
  18. 182
  19. 196
  20. 21
  21. 130
  22. 32
  23. 42
  24. 53
  25. 58
  26. 77
  27. 36
  28. 41
  29. 56
  30. 14
  31. 162
  32. 138
  33. 66
  34. 72
  35. 142
  36. 32
  37. 74
  38. 22
  39. 50
  40. 94

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