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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 846 · 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 98 =
  2. 2.Double 37 =
  3. 3.Double 21 =
  4. 4.Half of 88 =
  5. 5.Double 51 =
  6. 6.Half of 168 =
  7. 7.Double 27 =
  8. 8.Half of 184 =
  9. 9.Double 81 =
  10. 10.Half of 116 =
  11. 11.Half of 36 =
  12. 12.Half of 112 =
  13. 13.Double 66 =
  14. 14.Half of 72 =
  15. 15.Half of 102 =
  16. 16.Double 61 =
  17. 17.Half of 182 =
  18. 18.Double 35 =
  19. 19.Double 39 =
  20. 20.Double 79 =
  21. 21.Half of 152 =
  22. 22.Double 36 =
  23. 23.Half of 18 =
  24. 24.Double 96 =
  25. 25.Double 41 =
  26. 26.Double 12 =
  27. 27.Half of 24 =
  28. 28.Half of 44 =
  29. 29.Half of 144 =
  30. 30.Double 28 =
  31. 31.Half of 114 =
  32. 32.Half of 32 =
  33. 33.Half of 138 =
  34. 34.Half of 82 =
  35. 35.Double 49 =
  36. 36.Double 55 =
  37. 37.Double 85 =
  38. 38.Double 78 =
  39. 39.Double 18 =
  40. 40.Double 16 =

Answer key

  1. 196
  2. 74
  3. 42
  4. 44
  5. 102
  6. 84
  7. 54
  8. 92
  9. 162
  10. 58
  11. 18
  12. 56
  13. 132
  14. 36
  15. 51
  16. 122
  17. 91
  18. 70
  19. 78
  20. 158
  21. 76
  22. 72
  23. 9
  24. 192
  25. 82
  26. 24
  27. 12
  28. 22
  29. 72
  30. 56
  31. 57
  32. 16
  33. 69
  34. 41
  35. 98
  36. 110
  37. 170
  38. 156
  39. 36
  40. 32

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