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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 540 · 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 65 =
  2. 2.Half of 54 =
  3. 3.Half of 86 =
  4. 4.Double 21 =
  5. 5.Double 94 =
  6. 6.Double 22 =
  7. 7.Double 11 =
  8. 8.Half of 142 =
  9. 9.Half of 44 =
  10. 10.Half of 182 =
  11. 11.Half of 82 =
  12. 12.Half of 94 =
  13. 13.Double 84 =
  14. 14.Double 72 =
  15. 15.Double 66 =
  16. 16.Double 91 =
  17. 17.Half of 156 =
  18. 18.Double 44 =
  19. 19.Half of 24 =
  20. 20.Double 13 =
  21. 21.Half of 62 =
  22. 22.Double 16 =
  23. 23.Double 25 =
  24. 24.Double 92 =
  25. 25.Double 98 =
  26. 26.Half of 18 =
  27. 27.Half of 122 =
  28. 28.Double 61 =
  29. 29.Half of 178 =
  30. 30.Half of 102 =
  31. 31.Double 54 =
  32. 32.Double 45 =
  33. 33.Double 41 =
  34. 34.Half of 132 =
  35. 35.Double 53 =
  36. 36.Half of 98 =
  37. 37.Double 76 =
  38. 38.Double 73 =
  39. 39.Half of 34 =
  40. 40.Double 34 =

Answer key

  1. 130
  2. 27
  3. 43
  4. 42
  5. 188
  6. 44
  7. 22
  8. 71
  9. 22
  10. 91
  11. 41
  12. 47
  13. 168
  14. 144
  15. 132
  16. 182
  17. 78
  18. 88
  19. 12
  20. 26
  21. 31
  22. 32
  23. 50
  24. 184
  25. 196
  26. 9
  27. 61
  28. 122
  29. 89
  30. 51
  31. 108
  32. 90
  33. 82
  34. 66
  35. 106
  36. 49
  37. 152
  38. 146
  39. 17
  40. 68

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