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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 464 · 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 21 =
  2. 2.Half of 38 =
  3. 3.Double 82 =
  4. 4.Half of 184 =
  5. 5.Half of 24 =
  6. 6.Double 53 =
  7. 7.Half of 86 =
  8. 8.Half of 132 =
  9. 9.Double 13 =
  10. 10.Half of 32 =
  11. 11.Double 29 =
  12. 12.Half of 44 =
  13. 13.Double 32 =
  14. 14.Double 65 =
  15. 15.Double 28 =
  16. 16.Half of 34 =
  17. 17.Half of 148 =
  18. 18.Half of 112 =
  19. 19.Half of 58 =
  20. 20.Double 42 =
  21. 21.Double 95 =
  22. 22.Double 17 =
  23. 23.Half of 198 =
  24. 24.Half of 62 =
  25. 25.Double 99 =
  26. 26.Double 33 =
  27. 27.Double 98 =
  28. 28.Double 56 =
  29. 29.Double 41 =
  30. 30.Double 91 =
  31. 31.Half of 178 =
  32. 32.Half of 42 =
  33. 33.Half of 144 =
  34. 34.Half of 128 =
  35. 35.Half of 174 =
  36. 36.Half of 92 =
  37. 37.Half of 142 =
  38. 38.Double 77 =
  39. 39.Half of 168 =
  40. 40.Double 43 =

Answer key

  1. 42
  2. 19
  3. 164
  4. 92
  5. 12
  6. 106
  7. 43
  8. 66
  9. 26
  10. 16
  11. 58
  12. 22
  13. 64
  14. 130
  15. 56
  16. 17
  17. 74
  18. 56
  19. 29
  20. 84
  21. 190
  22. 34
  23. 99
  24. 31
  25. 198
  26. 66
  27. 196
  28. 112
  29. 82
  30. 182
  31. 89
  32. 21
  33. 72
  34. 64
  35. 87
  36. 46
  37. 71
  38. 154
  39. 84
  40. 86

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