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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 558 · 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 56 =
  2. 2.Half of 122 =
  3. 3.Double 28 =
  4. 4.Half of 126 =
  5. 5.Double 55 =
  6. 6.Half of 152 =
  7. 7.Double 72 =
  8. 8.Half of 132 =
  9. 9.Half of 128 =
  10. 10.Half of 172 =
  11. 11.Double 79 =
  12. 12.Double 51 =
  13. 13.Half of 166 =
  14. 14.Half of 56 =
  15. 15.Double 19 =
  16. 16.Double 63 =
  17. 17.Half of 146 =
  18. 18.Half of 134 =
  19. 19.Half of 22 =
  20. 20.Half of 32 =
  21. 21.Double 93 =
  22. 22.Double 62 =
  23. 23.Double 73 =
  24. 24.Double 31 =
  25. 25.Double 58 =
  26. 26.Half of 12 =
  27. 27.Double 21 =
  28. 28.Half of 76 =
  29. 29.Double 29 =
  30. 30.Half of 188 =
  31. 31.Half of 58 =
  32. 32.Double 81 =
  33. 33.Double 46 =
  34. 34.Half of 182 =
  35. 35.Double 41 =
  36. 36.Half of 44 =
  37. 37.Double 36 =
  38. 38.Half of 98 =
  39. 39.Half of 88 =
  40. 40.Half of 18 =

Answer key

  1. 112
  2. 61
  3. 56
  4. 63
  5. 110
  6. 76
  7. 144
  8. 66
  9. 64
  10. 86
  11. 158
  12. 102
  13. 83
  14. 28
  15. 38
  16. 126
  17. 73
  18. 67
  19. 11
  20. 16
  21. 186
  22. 124
  23. 146
  24. 62
  25. 116
  26. 6
  27. 42
  28. 38
  29. 58
  30. 94
  31. 29
  32. 162
  33. 92
  34. 91
  35. 82
  36. 22
  37. 72
  38. 49
  39. 44
  40. 9

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