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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 954 · 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 104 =
  2. 2.Double 61 =
  3. 3.Half of 178 =
  4. 4.Half of 142 =
  5. 5.Double 21 =
  6. 6.Half of 164 =
  7. 7.Half of 46 =
  8. 8.Double 72 =
  9. 9.Double 18 =
  10. 10.Half of 26 =
  11. 11.Double 51 =
  12. 12.Double 74 =
  13. 13.Half of 18 =
  14. 14.Double 19 =
  15. 15.Double 27 =
  16. 16.Half of 72 =
  17. 17.Half of 94 =
  18. 18.Double 83 =
  19. 19.Double 65 =
  20. 20.Double 45 =
  21. 21.Half of 122 =
  22. 22.Half of 166 =
  23. 23.Half of 146 =
  24. 24.Half of 128 =
  25. 25.Half of 28 =
  26. 26.Double 85 =
  27. 27.Double 41 =
  28. 28.Half of 12 =
  29. 29.Half of 182 =
  30. 30.Half of 162 =
  31. 31.Double 37 =
  32. 32.Double 86 =
  33. 33.Half of 22 =
  34. 34.Double 87 =
  35. 35.Half of 156 =
  36. 36.Double 92 =
  37. 37.Double 73 =
  38. 38.Double 11 =
  39. 39.Double 71 =
  40. 40.Double 13 =

Answer key

  1. 52
  2. 122
  3. 89
  4. 71
  5. 42
  6. 82
  7. 23
  8. 144
  9. 36
  10. 13
  11. 102
  12. 148
  13. 9
  14. 38
  15. 54
  16. 36
  17. 47
  18. 166
  19. 130
  20. 90
  21. 61
  22. 83
  23. 73
  24. 64
  25. 14
  26. 170
  27. 82
  28. 6
  29. 91
  30. 81
  31. 74
  32. 172
  33. 11
  34. 174
  35. 78
  36. 184
  37. 146
  38. 22
  39. 142
  40. 26

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