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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 980 · 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 66 =
  2. 2.Double 15 =
  3. 3.Half of 174 =
  4. 4.Double 34 =
  5. 5.Half of 48 =
  6. 6.Double 74 =
  7. 7.Half of 64 =
  8. 8.Half of 12 =
  9. 9.Double 18 =
  10. 10.Half of 134 =
  11. 11.Half of 52 =
  12. 12.Double 76 =
  13. 13.Double 79 =
  14. 14.Half of 132 =
  15. 15.Half of 142 =
  16. 16.Half of 42 =
  17. 17.Double 19 =
  18. 18.Half of 166 =
  19. 19.Half of 96 =
  20. 20.Double 51 =
  21. 21.Double 33 =
  22. 22.Double 49 =
  23. 23.Double 75 =
  24. 24.Double 85 =
  25. 25.Half of 44 =
  26. 26.Double 81 =
  27. 27.Double 98 =
  28. 28.Half of 82 =
  29. 29.Half of 68 =
  30. 30.Double 31 =
  31. 31.Half of 164 =
  32. 32.Half of 144 =
  33. 33.Double 95 =
  34. 34.Double 96 =
  35. 35.Half of 156 =
  36. 36.Double 25 =
  37. 37.Half of 78 =
  38. 38.Half of 172 =
  39. 39.Double 99 =
  40. 40.Half of 84 =

Answer key

  1. 33
  2. 30
  3. 87
  4. 68
  5. 24
  6. 148
  7. 32
  8. 6
  9. 36
  10. 67
  11. 26
  12. 152
  13. 158
  14. 66
  15. 71
  16. 21
  17. 38
  18. 83
  19. 48
  20. 102
  21. 66
  22. 98
  23. 150
  24. 170
  25. 22
  26. 162
  27. 196
  28. 41
  29. 34
  30. 62
  31. 82
  32. 72
  33. 190
  34. 192
  35. 78
  36. 50
  37. 39
  38. 86
  39. 198
  40. 42

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