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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 619 · 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 71 =
  2. 2.Half of 154 =
  3. 3.Half of 142 =
  4. 4.Half of 182 =
  5. 5.Double 31 =
  6. 6.Double 82 =
  7. 7.Half of 102 =
  8. 8.Double 33 =
  9. 9.Half of 106 =
  10. 10.Half of 126 =
  11. 11.Half of 152 =
  12. 12.Half of 112 =
  13. 13.Half of 164 =
  14. 14.Double 35 =
  15. 15.Double 39 =
  16. 16.Double 34 =
  17. 17.Half of 62 =
  18. 18.Double 43 =
  19. 19.Double 65 =
  20. 20.Half of 52 =
  21. 21.Half of 116 =
  22. 22.Double 98 =
  23. 23.Double 29 =
  24. 24.Double 24 =
  25. 25.Half of 122 =
  26. 26.Double 66 =
  27. 27.Double 74 =
  28. 28.Half of 58 =
  29. 29.Double 32 =
  30. 30.Double 38 =
  31. 31.Double 84 =
  32. 32.Double 16 =
  33. 33.Double 26 =
  34. 34.Half of 34 =
  35. 35.Double 72 =
  36. 36.Double 21 =
  37. 37.Half of 138 =
  38. 38.Double 94 =
  39. 39.Double 53 =
  40. 40.Double 61 =

Answer key

  1. 142
  2. 77
  3. 71
  4. 91
  5. 62
  6. 164
  7. 51
  8. 66
  9. 53
  10. 63
  11. 76
  12. 56
  13. 82
  14. 70
  15. 78
  16. 68
  17. 31
  18. 86
  19. 130
  20. 26
  21. 58
  22. 196
  23. 58
  24. 48
  25. 61
  26. 132
  27. 148
  28. 29
  29. 64
  30. 76
  31. 168
  32. 32
  33. 52
  34. 17
  35. 144
  36. 42
  37. 69
  38. 188
  39. 106
  40. 122

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