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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 848 · 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 75 =
  2. 2.Half of 34 =
  3. 3.Half of 84 =
  4. 4.Double 17 =
  5. 5.Double 31 =
  6. 6.Half of 22 =
  7. 7.Double 87 =
  8. 8.Half of 24 =
  9. 9.Double 16 =
  10. 10.Double 23 =
  11. 11.Double 28 =
  12. 12.Double 48 =
  13. 13.Double 79 =
  14. 14.Half of 168 =
  15. 15.Half of 194 =
  16. 16.Double 37 =
  17. 17.Double 22 =
  18. 18.Half of 158 =
  19. 19.Double 24 =
  20. 20.Double 18 =
  21. 21.Double 94 =
  22. 22.Half of 98 =
  23. 23.Half of 152 =
  24. 24.Double 35 =
  25. 25.Half of 188 =
  26. 26.Double 19 =
  27. 27.Half of 52 =
  28. 28.Double 51 =
  29. 29.Half of 192 =
  30. 30.Double 71 =
  31. 31.Half of 36 =
  32. 32.Double 84 =
  33. 33.Double 53 =
  34. 34.Half of 108 =
  35. 35.Double 55 =
  36. 36.Double 61 =
  37. 37.Double 89 =
  38. 38.Half of 72 =
  39. 39.Double 36 =
  40. 40.Half of 122 =

Answer key

  1. 150
  2. 17
  3. 42
  4. 34
  5. 62
  6. 11
  7. 174
  8. 12
  9. 32
  10. 46
  11. 56
  12. 96
  13. 158
  14. 84
  15. 97
  16. 74
  17. 44
  18. 79
  19. 48
  20. 36
  21. 188
  22. 49
  23. 76
  24. 70
  25. 94
  26. 38
  27. 26
  28. 102
  29. 96
  30. 142
  31. 18
  32. 168
  33. 106
  34. 54
  35. 110
  36. 122
  37. 178
  38. 36
  39. 72
  40. 61

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