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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 693 · 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 83 =
  2. 2.Half of 58 =
  3. 3.Half of 146 =
  4. 4.Double 54 =
  5. 5.Half of 132 =
  6. 6.Double 72 =
  7. 7.Half of 12 =
  8. 8.Half of 22 =
  9. 9.Half of 178 =
  10. 10.Double 44 =
  11. 11.Double 46 =
  12. 12.Half of 16 =
  13. 13.Double 15 =
  14. 14.Half of 128 =
  15. 15.Half of 192 =
  16. 16.Half of 62 =
  17. 17.Double 34 =
  18. 18.Double 27 =
  19. 19.Half of 66 =
  20. 20.Half of 142 =
  21. 21.Half of 176 =
  22. 22.Double 57 =
  23. 23.Double 78 =
  24. 24.Double 24 =
  25. 25.Double 58 =
  26. 26.Half of 166 =
  27. 27.Double 52 =
  28. 28.Double 21 =
  29. 29.Double 13 =
  30. 30.Half of 156 =
  31. 31.Half of 84 =
  32. 32.Double 92 =
  33. 33.Double 36 =
  34. 34.Half of 182 =
  35. 35.Double 17 =
  36. 36.Half of 152 =
  37. 37.Double 31 =
  38. 38.Double 53 =
  39. 39.Double 99 =
  40. 40.Double 23 =

Answer key

  1. 166
  2. 29
  3. 73
  4. 108
  5. 66
  6. 144
  7. 6
  8. 11
  9. 89
  10. 88
  11. 92
  12. 8
  13. 30
  14. 64
  15. 96
  16. 31
  17. 68
  18. 54
  19. 33
  20. 71
  21. 88
  22. 114
  23. 156
  24. 48
  25. 116
  26. 83
  27. 104
  28. 42
  29. 26
  30. 78
  31. 42
  32. 184
  33. 72
  34. 91
  35. 34
  36. 76
  37. 62
  38. 106
  39. 198
  40. 46

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