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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 908 · 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 98 =
  2. 2.Half of 92 =
  3. 3.Double 16 =
  4. 4.Half of 142 =
  5. 5.Half of 118 =
  6. 6.Double 58 =
  7. 7.Half of 34 =
  8. 8.Half of 106 =
  9. 9.Double 41 =
  10. 10.Half of 152 =
  11. 11.Double 42 =
  12. 12.Half of 122 =
  13. 13.Half of 108 =
  14. 14.Double 38 =
  15. 15.Double 27 =
  16. 16.Half of 168 =
  17. 17.Double 54 =
  18. 18.Double 66 =
  19. 19.Half of 44 =
  20. 20.Double 79 =
  21. 21.Double 33 =
  22. 22.Double 87 =
  23. 23.Half of 32 =
  24. 24.Half of 84 =
  25. 25.Double 91 =
  26. 26.Half of 48 =
  27. 27.Double 99 =
  28. 28.Half of 36 =
  29. 29.Double 71 =
  30. 30.Double 55 =
  31. 31.Double 14 =
  32. 32.Double 52 =
  33. 33.Double 82 =
  34. 34.Double 12 =
  35. 35.Half of 124 =
  36. 36.Half of 164 =
  37. 37.Double 98 =
  38. 38.Half of 174 =
  39. 39.Half of 54 =
  40. 40.Double 36 =

Answer key

  1. 49
  2. 46
  3. 32
  4. 71
  5. 59
  6. 116
  7. 17
  8. 53
  9. 82
  10. 76
  11. 84
  12. 61
  13. 54
  14. 76
  15. 54
  16. 84
  17. 108
  18. 132
  19. 22
  20. 158
  21. 66
  22. 174
  23. 16
  24. 42
  25. 182
  26. 24
  27. 198
  28. 18
  29. 142
  30. 110
  31. 28
  32. 104
  33. 164
  34. 24
  35. 62
  36. 82
  37. 196
  38. 87
  39. 27
  40. 72

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