← Doubles and halves game lesson New set →

Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 639 · 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.Half of 38 =
  2. 2.Double 86 =
  3. 3.Double 66 =
  4. 4.Double 91 =
  5. 5.Half of 186 =
  6. 6.Double 34 =
  7. 7.Double 41 =
  8. 8.Half of 64 =
  9. 9.Double 12 =
  10. 10.Double 14 =
  11. 11.Double 71 =
  12. 12.Half of 108 =
  13. 13.Half of 196 =
  14. 14.Double 74 =
  15. 15.Half of 142 =
  16. 16.Half of 72 =
  17. 17.Half of 154 =
  18. 18.Double 21 =
  19. 19.Double 39 =
  20. 20.Double 27 =
  21. 21.Half of 76 =
  22. 22.Double 54 =
  23. 23.Half of 194 =
  24. 24.Double 38 =
  25. 25.Double 24 =
  26. 26.Half of 128 =
  27. 27.Half of 42 =
  28. 28.Double 67 =
  29. 29.Double 48 =
  30. 30.Double 15 =
  31. 31.Half of 136 =
  32. 32.Half of 46 =
  33. 33.Half of 152 =
  34. 34.Half of 54 =
  35. 35.Double 75 =
  36. 36.Half of 22 =
  37. 37.Half of 132 =
  38. 38.Double 78 =
  39. 39.Half of 192 =
  40. 40.Half of 48 =

Answer key

  1. 19
  2. 172
  3. 132
  4. 182
  5. 93
  6. 68
  7. 82
  8. 32
  9. 24
  10. 28
  11. 142
  12. 54
  13. 98
  14. 148
  15. 71
  16. 36
  17. 77
  18. 42
  19. 78
  20. 54
  21. 38
  22. 108
  23. 97
  24. 76
  25. 48
  26. 64
  27. 21
  28. 134
  29. 96
  30. 30
  31. 68
  32. 23
  33. 76
  34. 27
  35. 150
  36. 11
  37. 66
  38. 156
  39. 96
  40. 24

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