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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 938 · 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 142 =
  2. 2.Double 86 =
  3. 3.Double 22 =
  4. 4.Half of 146 =
  5. 5.Half of 58 =
  6. 6.Double 36 =
  7. 7.Half of 172 =
  8. 8.Double 37 =
  9. 9.Double 61 =
  10. 10.Half of 152 =
  11. 11.Double 51 =
  12. 12.Half of 42 =
  13. 13.Half of 34 =
  14. 14.Half of 114 =
  15. 15.Double 71 =
  16. 16.Half of 182 =
  17. 17.Double 21 =
  18. 18.Half of 92 =
  19. 19.Double 58 =
  20. 20.Double 25 =
  21. 21.Half of 14 =
  22. 22.Half of 122 =
  23. 23.Half of 188 =
  24. 24.Half of 62 =
  25. 25.Double 45 =
  26. 26.Half of 128 =
  27. 27.Half of 44 =
  28. 28.Half of 196 =
  29. 29.Half of 68 =
  30. 30.Double 41 =
  31. 31.Half of 134 =
  32. 32.Double 17 =
  33. 33.Half of 66 =
  34. 34.Half of 162 =
  35. 35.Double 87 =
  36. 36.Double 28 =
  37. 37.Double 47 =
  38. 38.Double 46 =
  39. 39.Half of 72 =
  40. 40.Double 76 =

Answer key

  1. 71
  2. 172
  3. 44
  4. 73
  5. 29
  6. 72
  7. 86
  8. 74
  9. 122
  10. 76
  11. 102
  12. 21
  13. 17
  14. 57
  15. 142
  16. 91
  17. 42
  18. 46
  19. 116
  20. 50
  21. 7
  22. 61
  23. 94
  24. 31
  25. 90
  26. 64
  27. 22
  28. 98
  29. 34
  30. 82
  31. 67
  32. 34
  33. 33
  34. 81
  35. 174
  36. 56
  37. 94
  38. 92
  39. 36
  40. 152

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