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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 972 · 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 75 =
  2. 2.Half of 84 =
  3. 3.Double 65 =
  4. 4.Double 57 =
  5. 5.Double 96 =
  6. 6.Half of 172 =
  7. 7.Half of 12 =
  8. 8.Half of 74 =
  9. 9.Double 61 =
  10. 10.Half of 62 =
  11. 11.Half of 42 =
  12. 12.Half of 182 =
  13. 13.Double 51 =
  14. 14.Double 83 =
  15. 15.Half of 34 =
  16. 16.Double 48 =
  17. 17.Half of 92 =
  18. 18.Half of 82 =
  19. 19.Half of 126 =
  20. 20.Half of 54 =
  21. 21.Half of 88 =
  22. 22.Double 28 =
  23. 23.Half of 26 =
  24. 24.Double 35 =
  25. 25.Half of 146 =
  26. 26.Double 98 =
  27. 27.Half of 144 =
  28. 28.Double 74 =
  29. 29.Double 91 =
  30. 30.Double 41 =
  31. 31.Double 43 =
  32. 32.Half of 102 =
  33. 33.Half of 128 =
  34. 34.Double 71 =
  35. 35.Double 73 =
  36. 36.Double 31 =
  37. 37.Half of 136 =
  38. 38.Double 44 =
  39. 39.Double 16 =
  40. 40.Half of 138 =

Answer key

  1. 150
  2. 42
  3. 130
  4. 114
  5. 192
  6. 86
  7. 6
  8. 37
  9. 122
  10. 31
  11. 21
  12. 91
  13. 102
  14. 166
  15. 17
  16. 96
  17. 46
  18. 41
  19. 63
  20. 27
  21. 44
  22. 56
  23. 13
  24. 70
  25. 73
  26. 196
  27. 72
  28. 148
  29. 182
  30. 82
  31. 86
  32. 51
  33. 64
  34. 142
  35. 146
  36. 62
  37. 68
  38. 88
  39. 32
  40. 69

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