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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 879 · 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 65 =
  2. 2.Double 81 =
  3. 3.Half of 102 =
  4. 4.Double 99 =
  5. 5.Half of 42 =
  6. 6.Double 75 =
  7. 7.Half of 176 =
  8. 8.Double 27 =
  9. 9.Double 54 =
  10. 10.Double 18 =
  11. 11.Half of 58 =
  12. 12.Double 72 =
  13. 13.Double 86 =
  14. 14.Double 53 =
  15. 15.Double 11 =
  16. 16.Double 31 =
  17. 17.Double 62 =
  18. 18.Half of 34 =
  19. 19.Double 25 =
  20. 20.Double 58 =
  21. 21.Double 55 =
  22. 22.Double 63 =
  23. 23.Double 32 =
  24. 24.Double 26 =
  25. 25.Half of 64 =
  26. 26.Double 45 =
  27. 27.Half of 196 =
  28. 28.Half of 126 =
  29. 29.Half of 74 =
  30. 30.Double 89 =
  31. 31.Double 69 =
  32. 32.Half of 144 =
  33. 33.Half of 156 =
  34. 34.Double 38 =
  35. 35.Double 23 =
  36. 36.Half of 54 =
  37. 37.Half of 112 =
  38. 38.Double 28 =
  39. 39.Double 93 =
  40. 40.Double 51 =

Answer key

  1. 130
  2. 162
  3. 51
  4. 198
  5. 21
  6. 150
  7. 88
  8. 54
  9. 108
  10. 36
  11. 29
  12. 144
  13. 172
  14. 106
  15. 22
  16. 62
  17. 124
  18. 17
  19. 50
  20. 116
  21. 110
  22. 126
  23. 64
  24. 52
  25. 32
  26. 90
  27. 98
  28. 63
  29. 37
  30. 178
  31. 138
  32. 72
  33. 78
  34. 76
  35. 46
  36. 27
  37. 56
  38. 56
  39. 186
  40. 102

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