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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 473 · 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 84 =
  2. 2.Half of 12 =
  3. 3.Half of 94 =
  4. 4.Double 71 =
  5. 5.Double 41 =
  6. 6.Half of 48 =
  7. 7.Double 67 =
  8. 8.Double 87 =
  9. 9.Double 24 =
  10. 10.Half of 64 =
  11. 11.Double 59 =
  12. 12.Half of 16 =
  13. 13.Double 28 =
  14. 14.Double 11 =
  15. 15.Double 56 =
  16. 16.Half of 112 =
  17. 17.Double 92 =
  18. 18.Half of 28 =
  19. 19.Half of 122 =
  20. 20.Half of 118 =
  21. 21.Double 64 =
  22. 22.Double 81 =
  23. 23.Half of 32 =
  24. 24.Half of 72 =
  25. 25.Double 26 =
  26. 26.Half of 52 =
  27. 27.Double 18 =
  28. 28.Double 57 =
  29. 29.Half of 178 =
  30. 30.Double 25 =
  31. 31.Double 34 =
  32. 32.Half of 54 =
  33. 33.Half of 162 =
  34. 34.Double 51 =
  35. 35.Double 21 =
  36. 36.Double 36 =
  37. 37.Half of 146 =
  38. 38.Double 91 =
  39. 39.Half of 142 =
  40. 40.Half of 26 =

Answer key

  1. 168
  2. 6
  3. 47
  4. 142
  5. 82
  6. 24
  7. 134
  8. 174
  9. 48
  10. 32
  11. 118
  12. 8
  13. 56
  14. 22
  15. 112
  16. 56
  17. 184
  18. 14
  19. 61
  20. 59
  21. 128
  22. 162
  23. 16
  24. 36
  25. 52
  26. 26
  27. 36
  28. 114
  29. 89
  30. 50
  31. 68
  32. 27
  33. 81
  34. 102
  35. 42
  36. 72
  37. 73
  38. 182
  39. 71
  40. 13

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