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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 239 · 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 122 =
  2. 2.Double 37 =
  3. 3.Double 65 =
  4. 4.Half of 152 =
  5. 5.Half of 78 =
  6. 6.Half of 96 =
  7. 7.Half of 132 =
  8. 8.Half of 42 =
  9. 9.Half of 112 =
  10. 10.Half of 18 =
  11. 11.Double 66 =
  12. 12.Double 34 =
  13. 13.Double 48 =
  14. 14.Half of 184 =
  15. 15.Half of 88 =
  16. 16.Double 27 =
  17. 17.Double 82 =
  18. 18.Double 49 =
  19. 19.Double 64 =
  20. 20.Double 94 =
  21. 21.Double 63 =
  22. 22.Double 62 =
  23. 23.Double 18 =
  24. 24.Half of 126 =
  25. 25.Double 98 =
  26. 26.Double 38 =
  27. 27.Double 42 =
  28. 28.Half of 16 =
  29. 29.Double 29 =
  30. 30.Double 97 =
  31. 31.Half of 104 =
  32. 32.Half of 86 =
  33. 33.Half of 138 =
  34. 34.Double 16 =
  35. 35.Half of 162 =
  36. 36.Double 24 =
  37. 37.Double 89 =
  38. 38.Double 88 =
  39. 39.Double 86 =
  40. 40.Double 31 =

Answer key

  1. 61
  2. 74
  3. 130
  4. 76
  5. 39
  6. 48
  7. 66
  8. 21
  9. 56
  10. 9
  11. 132
  12. 68
  13. 96
  14. 92
  15. 44
  16. 54
  17. 164
  18. 98
  19. 128
  20. 188
  21. 126
  22. 124
  23. 36
  24. 63
  25. 196
  26. 76
  27. 84
  28. 8
  29. 58
  30. 194
  31. 52
  32. 43
  33. 69
  34. 32
  35. 81
  36. 48
  37. 178
  38. 176
  39. 172
  40. 62

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