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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 911 · 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 94 =
  2. 2.Double 99 =
  3. 3.Double 75 =
  4. 4.Half of 74 =
  5. 5.Double 73 =
  6. 6.Half of 52 =
  7. 7.Double 22 =
  8. 8.Double 29 =
  9. 9.Half of 102 =
  10. 10.Half of 174 =
  11. 11.Double 21 =
  12. 12.Double 33 =
  13. 13.Half of 22 =
  14. 14.Double 85 =
  15. 15.Half of 86 =
  16. 16.Double 48 =
  17. 17.Double 56 =
  18. 18.Half of 162 =
  19. 19.Double 72 =
  20. 20.Double 46 =
  21. 21.Double 69 =
  22. 22.Double 18 =
  23. 23.Double 14 =
  24. 24.Double 24 =
  25. 25.Double 34 =
  26. 26.Half of 126 =
  27. 27.Half of 68 =
  28. 28.Half of 148 =
  29. 29.Half of 134 =
  30. 30.Half of 156 =
  31. 31.Double 95 =
  32. 32.Half of 42 =
  33. 33.Double 11 =
  34. 34.Half of 14 =
  35. 35.Half of 96 =
  36. 36.Half of 72 =
  37. 37.Half of 54 =
  38. 38.Half of 168 =
  39. 39.Double 25 =
  40. 40.Half of 36 =

Answer key

  1. 188
  2. 198
  3. 150
  4. 37
  5. 146
  6. 26
  7. 44
  8. 58
  9. 51
  10. 87
  11. 42
  12. 66
  13. 11
  14. 170
  15. 43
  16. 96
  17. 112
  18. 81
  19. 144
  20. 92
  21. 138
  22. 36
  23. 28
  24. 48
  25. 68
  26. 63
  27. 34
  28. 74
  29. 67
  30. 78
  31. 190
  32. 21
  33. 22
  34. 7
  35. 48
  36. 36
  37. 27
  38. 84
  39. 50
  40. 18

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