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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 698 · 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 99 =
  2. 2.Half of 176 =
  3. 3.Double 69 =
  4. 4.Double 15 =
  5. 5.Double 83 =
  6. 6.Double 19 =
  7. 7.Half of 44 =
  8. 8.Half of 22 =
  9. 9.Double 35 =
  10. 10.Double 44 =
  11. 11.Double 81 =
  12. 12.Double 32 =
  13. 13.Half of 72 =
  14. 14.Double 41 =
  15. 15.Half of 92 =
  16. 16.Half of 18 =
  17. 17.Half of 12 =
  18. 18.Half of 58 =
  19. 19.Double 46 =
  20. 20.Double 26 =
  21. 21.Double 17 =
  22. 22.Double 56 =
  23. 23.Double 65 =
  24. 24.Half of 196 =
  25. 25.Double 61 =
  26. 26.Half of 138 =
  27. 27.Half of 156 =
  28. 28.Half of 142 =
  29. 29.Double 89 =
  30. 30.Double 95 =
  31. 31.Double 86 =
  32. 32.Half of 104 =
  33. 33.Double 67 =
  34. 34.Half of 172 =
  35. 35.Double 16 =
  36. 36.Half of 36 =
  37. 37.Double 21 =
  38. 38.Double 82 =
  39. 39.Double 98 =
  40. 40.Double 52 =

Answer key

  1. 198
  2. 88
  3. 138
  4. 30
  5. 166
  6. 38
  7. 22
  8. 11
  9. 70
  10. 88
  11. 162
  12. 64
  13. 36
  14. 82
  15. 46
  16. 9
  17. 6
  18. 29
  19. 92
  20. 52
  21. 34
  22. 112
  23. 130
  24. 98
  25. 122
  26. 69
  27. 78
  28. 71
  29. 178
  30. 190
  31. 172
  32. 52
  33. 134
  34. 86
  35. 32
  36. 18
  37. 42
  38. 164
  39. 196
  40. 104

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