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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 850 · 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 37 =
  3. 3.Double 61 =
  4. 4.Double 36 =
  5. 5.Double 71 =
  6. 6.Double 83 =
  7. 7.Double 35 =
  8. 8.Half of 42 =
  9. 9.Double 41 =
  10. 10.Double 13 =
  11. 11.Half of 58 =
  12. 12.Half of 138 =
  13. 13.Double 51 =
  14. 14.Half of 128 =
  15. 15.Half of 162 =
  16. 16.Half of 182 =
  17. 17.Half of 176 =
  18. 18.Half of 188 =
  19. 19.Half of 74 =
  20. 20.Half of 132 =
  21. 21.Half of 168 =
  22. 22.Double 23 =
  23. 23.Double 19 =
  24. 24.Half of 62 =
  25. 25.Double 95 =
  26. 26.Half of 54 =
  27. 27.Double 64 =
  28. 28.Double 94 =
  29. 29.Half of 192 =
  30. 30.Double 99 =
  31. 31.Half of 184 =
  32. 32.Double 52 =
  33. 33.Half of 34 =
  34. 34.Double 31 =
  35. 35.Half of 64 =
  36. 36.Half of 144 =
  37. 37.Double 21 =
  38. 38.Half of 24 =
  39. 39.Double 82 =
  40. 40.Double 24 =

Answer key

  1. 176
  2. 74
  3. 122
  4. 72
  5. 142
  6. 166
  7. 70
  8. 21
  9. 82
  10. 26
  11. 29
  12. 69
  13. 102
  14. 64
  15. 81
  16. 91
  17. 88
  18. 94
  19. 37
  20. 66
  21. 84
  22. 46
  23. 38
  24. 31
  25. 190
  26. 27
  27. 128
  28. 188
  29. 96
  30. 198
  31. 92
  32. 104
  33. 17
  34. 62
  35. 32
  36. 72
  37. 42
  38. 12
  39. 164
  40. 48

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