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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 871 · 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 26 =
  2. 2.Double 39 =
  3. 3.Half of 52 =
  4. 4.Double 76 =
  5. 5.Half of 162 =
  6. 6.Double 71 =
  7. 7.Half of 22 =
  8. 8.Half of 92 =
  9. 9.Double 93 =
  10. 10.Double 29 =
  11. 11.Double 31 =
  12. 12.Half of 132 =
  13. 13.Half of 96 =
  14. 14.Half of 142 =
  15. 15.Half of 64 =
  16. 16.Half of 88 =
  17. 17.Half of 98 =
  18. 18.Double 54 =
  19. 19.Double 45 =
  20. 20.Double 78 =
  21. 21.Half of 102 =
  22. 22.Half of 42 =
  23. 23.Double 15 =
  24. 24.Double 36 =
  25. 25.Half of 72 =
  26. 26.Double 63 =
  27. 27.Double 33 =
  28. 28.Half of 32 =
  29. 29.Half of 14 =
  30. 30.Double 74 =
  31. 31.Double 73 =
  32. 32.Double 92 =
  33. 33.Half of 194 =
  34. 34.Half of 166 =
  35. 35.Half of 138 =
  36. 36.Half of 62 =
  37. 37.Half of 38 =
  38. 38.Double 68 =
  39. 39.Double 88 =
  40. 40.Double 41 =

Answer key

  1. 52
  2. 78
  3. 26
  4. 152
  5. 81
  6. 142
  7. 11
  8. 46
  9. 186
  10. 58
  11. 62
  12. 66
  13. 48
  14. 71
  15. 32
  16. 44
  17. 49
  18. 108
  19. 90
  20. 156
  21. 51
  22. 21
  23. 30
  24. 72
  25. 36
  26. 126
  27. 66
  28. 16
  29. 7
  30. 148
  31. 146
  32. 184
  33. 97
  34. 83
  35. 69
  36. 31
  37. 19
  38. 136
  39. 176
  40. 82

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