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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 985 · 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 35 =
  2. 2.Half of 48 =
  3. 3.Double 96 =
  4. 4.Double 25 =
  5. 5.Half of 84 =
  6. 6.Double 54 =
  7. 7.Double 66 =
  8. 8.Double 95 =
  9. 9.Double 99 =
  10. 10.Half of 188 =
  11. 11.Double 78 =
  12. 12.Half of 118 =
  13. 13.Double 43 =
  14. 14.Half of 38 =
  15. 15.Half of 136 =
  16. 16.Double 13 =
  17. 17.Double 18 =
  18. 18.Double 92 =
  19. 19.Half of 76 =
  20. 20.Half of 28 =
  21. 21.Double 86 =
  22. 22.Double 56 =
  23. 23.Half of 122 =
  24. 24.Double 76 =
  25. 25.Half of 112 =
  26. 26.Double 12 =
  27. 27.Double 79 =
  28. 28.Half of 92 =
  29. 29.Double 81 =
  30. 30.Half of 88 =
  31. 31.Double 36 =
  32. 32.Half of 82 =
  33. 33.Double 14 =
  34. 34.Double 31 =
  35. 35.Double 34 =
  36. 36.Half of 72 =
  37. 37.Half of 54 =
  38. 38.Double 64 =
  39. 39.Half of 98 =
  40. 40.Double 59 =

Answer key

  1. 70
  2. 24
  3. 192
  4. 50
  5. 42
  6. 108
  7. 132
  8. 190
  9. 198
  10. 94
  11. 156
  12. 59
  13. 86
  14. 19
  15. 68
  16. 26
  17. 36
  18. 184
  19. 38
  20. 14
  21. 172
  22. 112
  23. 61
  24. 152
  25. 56
  26. 24
  27. 158
  28. 46
  29. 162
  30. 44
  31. 72
  32. 41
  33. 28
  34. 62
  35. 68
  36. 36
  37. 27
  38. 128
  39. 49
  40. 118

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