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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 915 · 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 66 =
  3. 3.Double 44 =
  4. 4.Double 79 =
  5. 5.Double 17 =
  6. 6.Double 71 =
  7. 7.Half of 166 =
  8. 8.Half of 24 =
  9. 9.Double 11 =
  10. 10.Double 39 =
  11. 11.Double 32 =
  12. 12.Half of 172 =
  13. 13.Half of 62 =
  14. 14.Half of 34 =
  15. 15.Double 41 =
  16. 16.Half of 44 =
  17. 17.Half of 156 =
  18. 18.Half of 152 =
  19. 19.Double 26 =
  20. 20.Double 22 =
  21. 21.Half of 132 =
  22. 22.Double 45 =
  23. 23.Double 31 =
  24. 24.Double 55 =
  25. 25.Double 76 =
  26. 26.Double 73 =
  27. 27.Half of 14 =
  28. 28.Half of 136 =
  29. 29.Half of 72 =
  30. 30.Half of 182 =
  31. 31.Double 19 =
  32. 32.Half of 138 =
  33. 33.Half of 92 =
  34. 34.Double 97 =
  35. 35.Half of 88 =
  36. 36.Double 21 =
  37. 37.Double 91 =
  38. 38.Double 75 =
  39. 39.Double 62 =
  40. 40.Double 64 =

Answer key

  1. 196
  2. 132
  3. 88
  4. 158
  5. 34
  6. 142
  7. 83
  8. 12
  9. 22
  10. 78
  11. 64
  12. 86
  13. 31
  14. 17
  15. 82
  16. 22
  17. 78
  18. 76
  19. 52
  20. 44
  21. 66
  22. 90
  23. 62
  24. 110
  25. 152
  26. 146
  27. 7
  28. 68
  29. 36
  30. 91
  31. 38
  32. 69
  33. 46
  34. 194
  35. 44
  36. 42
  37. 182
  38. 150
  39. 124
  40. 128

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