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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 370 · 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 138 =
  3. 3.Half of 42 =
  4. 4.Half of 188 =
  5. 5.Double 85 =
  6. 6.Double 87 =
  7. 7.Double 83 =
  8. 8.Half of 134 =
  9. 9.Half of 98 =
  10. 10.Double 11 =
  11. 11.Double 21 =
  12. 12.Double 62 =
  13. 13.Double 75 =
  14. 14.Half of 74 =
  15. 15.Half of 38 =
  16. 16.Double 13 =
  17. 17.Double 18 =
  18. 18.Double 41 =
  19. 19.Double 63 =
  20. 20.Double 98 =
  21. 21.Half of 176 =
  22. 22.Double 61 =
  23. 23.Half of 92 =
  24. 24.Half of 158 =
  25. 25.Half of 26 =
  26. 26.Half of 142 =
  27. 27.Half of 186 =
  28. 28.Double 67 =
  29. 29.Half of 152 =
  30. 30.Double 64 =
  31. 31.Half of 72 =
  32. 32.Double 79 =
  33. 33.Double 26 =
  34. 34.Half of 172 =
  35. 35.Double 95 =
  36. 36.Double 46 =
  37. 37.Double 12 =
  38. 38.Double 82 =
  39. 39.Double 48 =
  40. 40.Half of 178 =

Answer key

  1. 58
  2. 69
  3. 21
  4. 94
  5. 170
  6. 174
  7. 166
  8. 67
  9. 49
  10. 22
  11. 42
  12. 124
  13. 150
  14. 37
  15. 19
  16. 26
  17. 36
  18. 82
  19. 126
  20. 196
  21. 88
  22. 122
  23. 46
  24. 79
  25. 13
  26. 71
  27. 93
  28. 134
  29. 76
  30. 128
  31. 36
  32. 158
  33. 52
  34. 86
  35. 190
  36. 92
  37. 24
  38. 164
  39. 96
  40. 89

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