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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 802 · 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 31 =
  2. 2.Half of 178 =
  3. 3.Double 29 =
  4. 4.Double 21 =
  5. 5.Half of 46 =
  6. 6.Double 24 =
  7. 7.Half of 138 =
  8. 8.Half of 134 =
  9. 9.Double 15 =
  10. 10.Double 27 =
  11. 11.Half of 34 =
  12. 12.Double 14 =
  13. 13.Double 51 =
  14. 14.Double 92 =
  15. 15.Double 93 =
  16. 16.Double 19 =
  17. 17.Half of 38 =
  18. 18.Double 11 =
  19. 19.Half of 142 =
  20. 20.Half of 166 =
  21. 21.Double 36 =
  22. 22.Half of 122 =
  23. 23.Half of 82 =
  24. 24.Half of 32 =
  25. 25.Double 22 =
  26. 26.Double 66 =
  27. 27.Half of 156 =
  28. 28.Half of 48 =
  29. 29.Double 55 =
  30. 30.Half of 158 =
  31. 31.Half of 42 =
  32. 32.Double 61 =
  33. 33.Double 98 =
  34. 34.Double 76 =
  35. 35.Half of 62 =
  36. 36.Double 57 =
  37. 37.Half of 182 =
  38. 38.Half of 12 =
  39. 39.Double 41 =
  40. 40.Half of 154 =

Answer key

  1. 62
  2. 89
  3. 58
  4. 42
  5. 23
  6. 48
  7. 69
  8. 67
  9. 30
  10. 54
  11. 17
  12. 28
  13. 102
  14. 184
  15. 186
  16. 38
  17. 19
  18. 22
  19. 71
  20. 83
  21. 72
  22. 61
  23. 41
  24. 16
  25. 44
  26. 132
  27. 78
  28. 24
  29. 110
  30. 79
  31. 21
  32. 122
  33. 196
  34. 152
  35. 31
  36. 114
  37. 91
  38. 6
  39. 82
  40. 77

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