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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 977 · 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 66 =
  2. 2.Half of 32 =
  3. 3.Half of 74 =
  4. 4.Half of 66 =
  5. 5.Half of 52 =
  6. 6.Half of 132 =
  7. 7.Double 33 =
  8. 8.Double 21 =
  9. 9.Double 71 =
  10. 10.Double 28 =
  11. 11.Double 68 =
  12. 12.Double 87 =
  13. 13.Half of 102 =
  14. 14.Half of 108 =
  15. 15.Double 38 =
  16. 16.Double 64 =
  17. 17.Double 77 =
  18. 18.Half of 146 =
  19. 19.Half of 168 =
  20. 20.Double 49 =
  21. 21.Half of 142 =
  22. 22.Half of 112 =
  23. 23.Half of 56 =
  24. 24.Double 31 =
  25. 25.Half of 188 =
  26. 26.Half of 48 =
  27. 27.Double 76 =
  28. 28.Double 99 =
  29. 29.Double 23 =
  30. 30.Double 35 =
  31. 31.Double 81 =
  32. 32.Double 51 =
  33. 33.Double 14 =
  34. 34.Double 59 =
  35. 35.Double 44 =
  36. 36.Double 32 =
  37. 37.Half of 34 =
  38. 38.Double 63 =
  39. 39.Half of 174 =
  40. 40.Double 19 =

Answer key

  1. 132
  2. 16
  3. 37
  4. 33
  5. 26
  6. 66
  7. 66
  8. 42
  9. 142
  10. 56
  11. 136
  12. 174
  13. 51
  14. 54
  15. 76
  16. 128
  17. 154
  18. 73
  19. 84
  20. 98
  21. 71
  22. 56
  23. 28
  24. 62
  25. 94
  26. 24
  27. 152
  28. 198
  29. 46
  30. 70
  31. 162
  32. 102
  33. 28
  34. 118
  35. 88
  36. 64
  37. 17
  38. 126
  39. 87
  40. 38

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