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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 409 · 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 88 =
  2. 2.Double 53 =
  3. 3.Double 11 =
  4. 4.Double 32 =
  5. 5.Half of 112 =
  6. 6.Double 61 =
  7. 7.Half of 64 =
  8. 8.Half of 122 =
  9. 9.Double 55 =
  10. 10.Double 65 =
  11. 11.Half of 34 =
  12. 12.Double 79 =
  13. 13.Half of 126 =
  14. 14.Double 69 =
  15. 15.Double 52 =
  16. 16.Double 78 =
  17. 17.Half of 58 =
  18. 18.Double 51 =
  19. 19.Double 12 =
  20. 20.Double 23 =
  21. 21.Double 64 =
  22. 22.Double 13 =
  23. 23.Double 14 =
  24. 24.Half of 84 =
  25. 25.Double 46 =
  26. 26.Half of 154 =
  27. 27.Double 18 =
  28. 28.Double 19 =
  29. 29.Double 66 =
  30. 30.Half of 174 =
  31. 31.Half of 16 =
  32. 32.Double 73 =
  33. 33.Half of 24 =
  34. 34.Double 71 =
  35. 35.Half of 72 =
  36. 36.Double 17 =
  37. 37.Double 96 =
  38. 38.Half of 22 =
  39. 39.Half of 54 =
  40. 40.Half of 52 =

Answer key

  1. 176
  2. 106
  3. 22
  4. 64
  5. 56
  6. 122
  7. 32
  8. 61
  9. 110
  10. 130
  11. 17
  12. 158
  13. 63
  14. 138
  15. 104
  16. 156
  17. 29
  18. 102
  19. 24
  20. 46
  21. 128
  22. 26
  23. 28
  24. 42
  25. 92
  26. 77
  27. 36
  28. 38
  29. 132
  30. 87
  31. 8
  32. 146
  33. 12
  34. 142
  35. 36
  36. 34
  37. 192
  38. 11
  39. 27
  40. 26

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