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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 896 · 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 78 =
  2. 2.Half of 74 =
  3. 3.Half of 28 =
  4. 4.Half of 192 =
  5. 5.Double 42 =
  6. 6.Double 47 =
  7. 7.Double 49 =
  8. 8.Half of 158 =
  9. 9.Double 64 =
  10. 10.Half of 132 =
  11. 11.Half of 22 =
  12. 12.Half of 72 =
  13. 13.Double 72 =
  14. 14.Half of 32 =
  15. 15.Double 43 =
  16. 16.Double 85 =
  17. 17.Double 29 =
  18. 18.Half of 172 =
  19. 19.Double 16 =
  20. 20.Double 51 =
  21. 21.Half of 84 =
  22. 22.Half of 178 =
  23. 23.Double 61 =
  24. 24.Double 95 =
  25. 25.Half of 174 =
  26. 26.Half of 196 =
  27. 27.Double 17 =
  28. 28.Half of 154 =
  29. 29.Half of 182 =
  30. 30.Half of 194 =
  31. 31.Half of 46 =
  32. 32.Half of 164 =
  33. 33.Double 23 =
  34. 34.Double 11 =
  35. 35.Double 86 =
  36. 36.Double 22 =
  37. 37.Double 91 =
  38. 38.Double 27 =
  39. 39.Double 26 =
  40. 40.Double 13 =

Answer key

  1. 156
  2. 37
  3. 14
  4. 96
  5. 84
  6. 94
  7. 98
  8. 79
  9. 128
  10. 66
  11. 11
  12. 36
  13. 144
  14. 16
  15. 86
  16. 170
  17. 58
  18. 86
  19. 32
  20. 102
  21. 42
  22. 89
  23. 122
  24. 190
  25. 87
  26. 98
  27. 34
  28. 77
  29. 91
  30. 97
  31. 23
  32. 82
  33. 46
  34. 22
  35. 172
  36. 44
  37. 182
  38. 54
  39. 52
  40. 26

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