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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 888 · 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 52 =
  2. 2.Double 31 =
  3. 3.Double 57 =
  4. 4.Half of 166 =
  5. 5.Half of 104 =
  6. 6.Double 68 =
  7. 7.Double 89 =
  8. 8.Double 72 =
  9. 9.Half of 134 =
  10. 10.Double 15 =
  11. 11.Half of 64 =
  12. 12.Double 71 =
  13. 13.Half of 162 =
  14. 14.Double 91 =
  15. 15.Half of 72 =
  16. 16.Double 32 =
  17. 17.Double 69 =
  18. 18.Half of 176 =
  19. 19.Double 41 =
  20. 20.Half of 114 =
  21. 21.Double 28 =
  22. 22.Half of 52 =
  23. 23.Double 21 =
  24. 24.Half of 82 =
  25. 25.Double 35 =
  26. 26.Half of 32 =
  27. 27.Half of 122 =
  28. 28.Half of 186 =
  29. 29.Half of 88 =
  30. 30.Half of 26 =
  31. 31.Double 18 =
  32. 32.Double 78 =
  33. 33.Half of 196 =
  34. 34.Half of 14 =
  35. 35.Half of 24 =
  36. 36.Double 84 =
  37. 37.Double 11 =
  38. 38.Double 42 =
  39. 39.Double 97 =
  40. 40.Half of 148 =

Answer key

  1. 104
  2. 62
  3. 114
  4. 83
  5. 52
  6. 136
  7. 178
  8. 144
  9. 67
  10. 30
  11. 32
  12. 142
  13. 81
  14. 182
  15. 36
  16. 64
  17. 138
  18. 88
  19. 82
  20. 57
  21. 56
  22. 26
  23. 42
  24. 41
  25. 70
  26. 16
  27. 61
  28. 93
  29. 44
  30. 13
  31. 36
  32. 156
  33. 98
  34. 7
  35. 12
  36. 168
  37. 22
  38. 84
  39. 194
  40. 74

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