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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 366 · 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 29 =
  2. 2.Half of 62 =
  3. 3.Double 73 =
  4. 4.Double 56 =
  5. 5.Half of 56 =
  6. 6.Half of 76 =
  7. 7.Half of 94 =
  8. 8.Double 35 =
  9. 9.Double 21 =
  10. 10.Double 45 =
  11. 11.Double 83 =
  12. 12.Double 75 =
  13. 13.Half of 126 =
  14. 14.Half of 152 =
  15. 15.Double 44 =
  16. 16.Half of 28 =
  17. 17.Double 62 =
  18. 18.Double 88 =
  19. 19.Half of 52 =
  20. 20.Half of 42 =
  21. 21.Double 94 =
  22. 22.Half of 158 =
  23. 23.Double 65 =
  24. 24.Double 79 =
  25. 25.Double 18 =
  26. 26.Half of 142 =
  27. 27.Double 74 =
  28. 28.Half of 22 =
  29. 29.Half of 18 =
  30. 30.Double 31 =
  31. 31.Half of 174 =
  32. 32.Double 46 =
  33. 33.Half of 194 =
  34. 34.Half of 186 =
  35. 35.Half of 12 =
  36. 36.Double 36 =
  37. 37.Double 24 =
  38. 38.Half of 136 =
  39. 39.Half of 118 =
  40. 40.Half of 156 =

Answer key

  1. 58
  2. 31
  3. 146
  4. 112
  5. 28
  6. 38
  7. 47
  8. 70
  9. 42
  10. 90
  11. 166
  12. 150
  13. 63
  14. 76
  15. 88
  16. 14
  17. 124
  18. 176
  19. 26
  20. 21
  21. 188
  22. 79
  23. 130
  24. 158
  25. 36
  26. 71
  27. 148
  28. 11
  29. 9
  30. 62
  31. 87
  32. 92
  33. 97
  34. 93
  35. 6
  36. 72
  37. 48
  38. 68
  39. 59
  40. 78

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