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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 970 · 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 82 =
  2. 2.Double 66 =
  3. 3.Half of 98 =
  4. 4.Double 55 =
  5. 5.Half of 162 =
  6. 6.Double 98 =
  7. 7.Half of 126 =
  8. 8.Double 61 =
  9. 9.Double 78 =
  10. 10.Double 36 =
  11. 11.Double 12 =
  12. 12.Half of 42 =
  13. 13.Double 15 =
  14. 14.Double 39 =
  15. 15.Half of 22 =
  16. 16.Half of 112 =
  17. 17.Double 47 =
  18. 18.Half of 168 =
  19. 19.Double 86 =
  20. 20.Half of 34 =
  21. 21.Double 25 =
  22. 22.Half of 154 =
  23. 23.Half of 132 =
  24. 24.Double 18 =
  25. 25.Double 54 =
  26. 26.Double 92 =
  27. 27.Half of 136 =
  28. 28.Double 32 =
  29. 29.Double 72 =
  30. 30.Half of 92 =
  31. 31.Half of 134 =
  32. 32.Half of 24 =
  33. 33.Double 44 =
  34. 34.Half of 144 =
  35. 35.Half of 158 =
  36. 36.Half of 36 =
  37. 37.Double 21 =
  38. 38.Double 88 =
  39. 39.Half of 78 =
  40. 40.Half of 142 =

Answer key

  1. 41
  2. 132
  3. 49
  4. 110
  5. 81
  6. 196
  7. 63
  8. 122
  9. 156
  10. 72
  11. 24
  12. 21
  13. 30
  14. 78
  15. 11
  16. 56
  17. 94
  18. 84
  19. 172
  20. 17
  21. 50
  22. 77
  23. 66
  24. 36
  25. 108
  26. 184
  27. 68
  28. 64
  29. 144
  30. 46
  31. 67
  32. 12
  33. 88
  34. 72
  35. 79
  36. 18
  37. 42
  38. 176
  39. 39
  40. 71

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