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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 855 · 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.Double 88 =
  3. 3.Double 56 =
  4. 4.Half of 94 =
  5. 5.Double 74 =
  6. 6.Half of 162 =
  7. 7.Half of 146 =
  8. 8.Half of 122 =
  9. 9.Half of 42 =
  10. 10.Double 73 =
  11. 11.Double 62 =
  12. 12.Half of 152 =
  13. 13.Half of 16 =
  14. 14.Double 81 =
  15. 15.Half of 22 =
  16. 16.Half of 32 =
  17. 17.Double 25 =
  18. 18.Half of 174 =
  19. 19.Half of 86 =
  20. 20.Half of 176 =
  21. 21.Half of 104 =
  22. 22.Half of 52 =
  23. 23.Half of 106 =
  24. 24.Half of 74 =
  25. 25.Double 55 =
  26. 26.Half of 134 =
  27. 27.Half of 24 =
  28. 28.Double 85 =
  29. 29.Half of 26 =
  30. 30.Double 71 =
  31. 31.Half of 164 =
  32. 32.Double 67 =
  33. 33.Half of 12 =
  34. 34.Half of 66 =
  35. 35.Double 42 =
  36. 36.Half of 44 =
  37. 37.Half of 56 =
  38. 38.Double 41 =
  39. 39.Half of 132 =
  40. 40.Double 18 =

Answer key

  1. 70
  2. 176
  3. 112
  4. 47
  5. 148
  6. 81
  7. 73
  8. 61
  9. 21
  10. 146
  11. 124
  12. 76
  13. 8
  14. 162
  15. 11
  16. 16
  17. 50
  18. 87
  19. 43
  20. 88
  21. 52
  22. 26
  23. 53
  24. 37
  25. 110
  26. 67
  27. 12
  28. 170
  29. 13
  30. 142
  31. 82
  32. 134
  33. 6
  34. 33
  35. 84
  36. 22
  37. 28
  38. 82
  39. 66
  40. 36

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