← Doubles and halves game lesson New set →

Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 488 · 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 61 =
  2. 2.Double 13 =
  3. 3.Double 21 =
  4. 4.Half of 112 =
  5. 5.Double 31 =
  6. 6.Double 52 =
  7. 7.Half of 96 =
  8. 8.Half of 138 =
  9. 9.Half of 52 =
  10. 10.Double 34 =
  11. 11.Double 92 =
  12. 12.Double 46 =
  13. 13.Half of 122 =
  14. 14.Double 82 =
  15. 15.Half of 172 =
  16. 16.Double 25 =
  17. 17.Double 55 =
  18. 18.Half of 106 =
  19. 19.Half of 142 =
  20. 20.Double 54 =
  21. 21.Half of 128 =
  22. 22.Half of 22 =
  23. 23.Double 18 =
  24. 24.Double 27 =
  25. 25.Half of 16 =
  26. 26.Double 77 =
  27. 27.Double 24 =
  28. 28.Half of 38 =
  29. 29.Half of 154 =
  30. 30.Double 71 =
  31. 31.Double 44 =
  32. 32.Half of 26 =
  33. 33.Half of 146 =
  34. 34.Double 48 =
  35. 35.Double 12 =
  36. 36.Double 47 =
  37. 37.Double 81 =
  38. 38.Double 73 =
  39. 39.Half of 42 =
  40. 40.Half of 132 =

Answer key

  1. 122
  2. 26
  3. 42
  4. 56
  5. 62
  6. 104
  7. 48
  8. 69
  9. 26
  10. 68
  11. 184
  12. 92
  13. 61
  14. 164
  15. 86
  16. 50
  17. 110
  18. 53
  19. 71
  20. 108
  21. 64
  22. 11
  23. 36
  24. 54
  25. 8
  26. 154
  27. 48
  28. 19
  29. 77
  30. 142
  31. 88
  32. 13
  33. 73
  34. 96
  35. 24
  36. 94
  37. 162
  38. 146
  39. 21
  40. 66

Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks