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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 939 · 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 106 =
  2. 2.Double 81 =
  3. 3.Double 18 =
  4. 4.Half of 98 =
  5. 5.Half of 118 =
  6. 6.Double 75 =
  7. 7.Double 55 =
  8. 8.Half of 162 =
  9. 9.Half of 16 =
  10. 10.Double 89 =
  11. 11.Double 61 =
  12. 12.Half of 34 =
  13. 13.Double 83 =
  14. 14.Half of 182 =
  15. 15.Double 27 =
  16. 16.Double 64 =
  17. 17.Double 77 =
  18. 18.Half of 72 =
  19. 19.Double 29 =
  20. 20.Half of 158 =
  21. 21.Half of 66 =
  22. 22.Double 16 =
  23. 23.Double 96 =
  24. 24.Half of 74 =
  25. 25.Double 42 =
  26. 26.Half of 52 =
  27. 27.Half of 148 =
  28. 28.Double 68 =
  29. 29.Half of 198 =
  30. 30.Double 84 =
  31. 31.Half of 114 =
  32. 32.Double 46 =
  33. 33.Double 45 =
  34. 34.Half of 152 =
  35. 35.Double 51 =
  36. 36.Double 88 =
  37. 37.Half of 194 =
  38. 38.Half of 78 =
  39. 39.Double 34 =
  40. 40.Half of 104 =

Answer key

  1. 53
  2. 162
  3. 36
  4. 49
  5. 59
  6. 150
  7. 110
  8. 81
  9. 8
  10. 178
  11. 122
  12. 17
  13. 166
  14. 91
  15. 54
  16. 128
  17. 154
  18. 36
  19. 58
  20. 79
  21. 33
  22. 32
  23. 192
  24. 37
  25. 84
  26. 26
  27. 74
  28. 136
  29. 99
  30. 168
  31. 57
  32. 92
  33. 90
  34. 76
  35. 102
  36. 176
  37. 97
  38. 39
  39. 68
  40. 52

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