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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 838 · 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 69 =
  2. 2.Half of 92 =
  3. 3.Double 32 =
  4. 4.Double 15 =
  5. 5.Double 99 =
  6. 6.Half of 182 =
  7. 7.Double 41 =
  8. 8.Half of 106 =
  9. 9.Double 96 =
  10. 10.Double 24 =
  11. 11.Double 58 =
  12. 12.Double 12 =
  13. 13.Double 39 =
  14. 14.Double 56 =
  15. 15.Double 44 =
  16. 16.Double 48 =
  17. 17.Double 18 =
  18. 18.Half of 32 =
  19. 19.Double 43 =
  20. 20.Half of 86 =
  21. 21.Half of 98 =
  22. 22.Double 14 =
  23. 23.Half of 68 =
  24. 24.Half of 198 =
  25. 25.Half of 56 =
  26. 26.Half of 26 =
  27. 27.Half of 162 =
  28. 28.Double 49 =
  29. 29.Double 42 =
  30. 30.Double 81 =
  31. 31.Half of 12 =
  32. 32.Half of 146 =
  33. 33.Half of 154 =
  34. 34.Double 64 =
  35. 35.Half of 132 =
  36. 36.Double 89 =
  37. 37.Half of 76 =
  38. 38.Half of 34 =
  39. 39.Half of 96 =
  40. 40.Double 67 =

Answer key

  1. 138
  2. 46
  3. 64
  4. 30
  5. 198
  6. 91
  7. 82
  8. 53
  9. 192
  10. 48
  11. 116
  12. 24
  13. 78
  14. 112
  15. 88
  16. 96
  17. 36
  18. 16
  19. 86
  20. 43
  21. 49
  22. 28
  23. 34
  24. 99
  25. 28
  26. 13
  27. 81
  28. 98
  29. 84
  30. 162
  31. 6
  32. 73
  33. 77
  34. 128
  35. 66
  36. 178
  37. 38
  38. 17
  39. 48
  40. 134

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