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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 957 · 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 24 =
  2. 2.Double 71 =
  3. 3.Double 18 =
  4. 4.Half of 108 =
  5. 5.Half of 94 =
  6. 6.Double 63 =
  7. 7.Half of 112 =
  8. 8.Half of 16 =
  9. 9.Double 28 =
  10. 10.Double 86 =
  11. 11.Half of 176 =
  12. 12.Double 51 =
  13. 13.Half of 72 =
  14. 14.Half of 64 =
  15. 15.Double 75 =
  16. 16.Double 61 =
  17. 17.Double 81 =
  18. 18.Double 34 =
  19. 19.Double 15 =
  20. 20.Half of 22 =
  21. 21.Half of 188 =
  22. 22.Double 82 =
  23. 23.Double 27 =
  24. 24.Double 74 =
  25. 25.Half of 136 =
  26. 26.Half of 82 =
  27. 27.Double 77 =
  28. 28.Double 12 =
  29. 29.Double 23 =
  30. 30.Half of 66 =
  31. 31.Half of 92 =
  32. 32.Double 98 =
  33. 33.Half of 194 =
  34. 34.Double 72 =
  35. 35.Double 38 =
  36. 36.Half of 36 =
  37. 37.Half of 168 =
  38. 38.Double 33 =
  39. 39.Half of 76 =
  40. 40.Half of 18 =

Answer key

  1. 48
  2. 142
  3. 36
  4. 54
  5. 47
  6. 126
  7. 56
  8. 8
  9. 56
  10. 172
  11. 88
  12. 102
  13. 36
  14. 32
  15. 150
  16. 122
  17. 162
  18. 68
  19. 30
  20. 11
  21. 94
  22. 164
  23. 54
  24. 148
  25. 68
  26. 41
  27. 154
  28. 24
  29. 46
  30. 33
  31. 46
  32. 196
  33. 97
  34. 144
  35. 76
  36. 18
  37. 84
  38. 66
  39. 38
  40. 9

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