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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 718 · 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 44 =
  2. 2.Double 69 =
  3. 3.Half of 112 =
  4. 4.Double 98 =
  5. 5.Double 24 =
  6. 6.Half of 62 =
  7. 7.Half of 64 =
  8. 8.Double 27 =
  9. 9.Half of 158 =
  10. 10.Double 25 =
  11. 11.Half of 178 =
  12. 12.Double 49 =
  13. 13.Double 39 =
  14. 14.Half of 18 =
  15. 15.Half of 192 =
  16. 16.Half of 68 =
  17. 17.Half of 146 =
  18. 18.Double 15 =
  19. 19.Double 89 =
  20. 20.Half of 154 =
  21. 21.Double 21 =
  22. 22.Double 31 =
  23. 23.Half of 66 =
  24. 24.Half of 72 =
  25. 25.Double 55 =
  26. 26.Half of 182 =
  27. 27.Double 74 =
  28. 28.Half of 38 =
  29. 29.Double 52 =
  30. 30.Double 81 =
  31. 31.Half of 166 =
  32. 32.Double 14 =
  33. 33.Double 67 =
  34. 34.Half of 98 =
  35. 35.Double 63 =
  36. 36.Half of 74 =
  37. 37.Half of 142 =
  38. 38.Half of 54 =
  39. 39.Half of 164 =
  40. 40.Half of 82 =

Answer key

  1. 22
  2. 138
  3. 56
  4. 196
  5. 48
  6. 31
  7. 32
  8. 54
  9. 79
  10. 50
  11. 89
  12. 98
  13. 78
  14. 9
  15. 96
  16. 34
  17. 73
  18. 30
  19. 178
  20. 77
  21. 42
  22. 62
  23. 33
  24. 36
  25. 110
  26. 91
  27. 148
  28. 19
  29. 104
  30. 162
  31. 83
  32. 28
  33. 134
  34. 49
  35. 126
  36. 37
  37. 71
  38. 27
  39. 82
  40. 41

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