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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 98 · 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 148 =
  2. 2.Half of 98 =
  3. 3.Half of 28 =
  4. 4.Double 82 =
  5. 5.Double 91 =
  6. 6.Half of 12 =
  7. 7.Double 56 =
  8. 8.Double 43 =
  9. 9.Half of 38 =
  10. 10.Double 53 =
  11. 11.Half of 24 =
  12. 12.Half of 142 =
  13. 13.Half of 56 =
  14. 14.Half of 26 =
  15. 15.Double 94 =
  16. 16.Half of 18 =
  17. 17.Double 58 =
  18. 18.Double 18 =
  19. 19.Double 49 =
  20. 20.Double 16 =
  21. 21.Half of 124 =
  22. 22.Double 44 =
  23. 23.Half of 22 =
  24. 24.Double 15 =
  25. 25.Double 34 =
  26. 26.Double 83 =
  27. 27.Double 98 =
  28. 28.Double 14 =
  29. 29.Double 37 =
  30. 30.Double 21 =
  31. 31.Double 62 =
  32. 32.Half of 166 =
  33. 33.Half of 158 =
  34. 34.Double 84 =
  35. 35.Double 67 =
  36. 36.Double 54 =
  37. 37.Double 73 =
  38. 38.Half of 182 =
  39. 39.Half of 62 =
  40. 40.Double 38 =

Answer key

  1. 74
  2. 49
  3. 14
  4. 164
  5. 182
  6. 6
  7. 112
  8. 86
  9. 19
  10. 106
  11. 12
  12. 71
  13. 28
  14. 13
  15. 188
  16. 9
  17. 116
  18. 36
  19. 98
  20. 32
  21. 62
  22. 88
  23. 11
  24. 30
  25. 68
  26. 166
  27. 196
  28. 28
  29. 74
  30. 42
  31. 124
  32. 83
  33. 79
  34. 168
  35. 134
  36. 108
  37. 146
  38. 91
  39. 31
  40. 76

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