← Doubles and halves game lesson New set →

Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 7 · 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 21 =
  2. 2.Half of 52 =
  3. 3.Double 57 =
  4. 4.Half of 148 =
  5. 5.Double 46 =
  6. 6.Double 72 =
  7. 7.Double 61 =
  8. 8.Double 89 =
  9. 9.Double 13 =
  10. 10.Half of 78 =
  11. 11.Double 41 =
  12. 12.Double 49 =
  13. 13.Double 29 =
  14. 14.Double 66 =
  15. 15.Double 91 =
  16. 16.Half of 162 =
  17. 17.Half of 34 =
  18. 18.Half of 132 =
  19. 19.Half of 126 =
  20. 20.Double 27 =
  21. 21.Half of 48 =
  22. 22.Half of 26 =
  23. 23.Double 58 =
  24. 24.Half of 64 =
  25. 25.Double 71 =
  26. 26.Half of 118 =
  27. 27.Half of 56 =
  28. 28.Half of 68 =
  29. 29.Double 47 =
  30. 30.Double 84 =
  31. 31.Half of 12 =
  32. 32.Double 85 =
  33. 33.Half of 174 =
  34. 34.Half of 196 =
  35. 35.Half of 112 =
  36. 36.Half of 168 =
  37. 37.Half of 186 =
  38. 38.Double 51 =
  39. 39.Half of 22 =
  40. 40.Half of 142 =

Answer key

  1. 42
  2. 26
  3. 114
  4. 74
  5. 92
  6. 144
  7. 122
  8. 178
  9. 26
  10. 39
  11. 82
  12. 98
  13. 58
  14. 132
  15. 182
  16. 81
  17. 17
  18. 66
  19. 63
  20. 54
  21. 24
  22. 13
  23. 116
  24. 32
  25. 142
  26. 59
  27. 28
  28. 34
  29. 94
  30. 168
  31. 6
  32. 170
  33. 87
  34. 98
  35. 56
  36. 84
  37. 93
  38. 102
  39. 11
  40. 71

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