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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 671 · 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 67 =
  2. 2.Half of 182 =
  3. 3.Half of 172 =
  4. 4.Half of 98 =
  5. 5.Double 25 =
  6. 6.Double 34 =
  7. 7.Double 81 =
  8. 8.Double 46 =
  9. 9.Half of 158 =
  10. 10.Half of 152 =
  11. 11.Half of 76 =
  12. 12.Double 19 =
  13. 13.Double 39 =
  14. 14.Double 78 =
  15. 15.Half of 14 =
  16. 16.Double 18 =
  17. 17.Half of 104 =
  18. 18.Double 21 =
  19. 19.Double 31 =
  20. 20.Double 86 =
  21. 21.Half of 52 =
  22. 22.Half of 92 =
  23. 23.Half of 32 =
  24. 24.Half of 136 =
  25. 25.Half of 38 =
  26. 26.Half of 62 =
  27. 27.Half of 46 =
  28. 28.Double 15 =
  29. 29.Double 66 =
  30. 30.Double 79 =
  31. 31.Double 13 =
  32. 32.Double 57 =
  33. 33.Half of 24 =
  34. 34.Half of 94 =
  35. 35.Half of 162 =
  36. 36.Double 64 =
  37. 37.Double 12 =
  38. 38.Double 38 =
  39. 39.Double 16 =
  40. 40.Half of 82 =

Answer key

  1. 134
  2. 91
  3. 86
  4. 49
  5. 50
  6. 68
  7. 162
  8. 92
  9. 79
  10. 76
  11. 38
  12. 38
  13. 78
  14. 156
  15. 7
  16. 36
  17. 52
  18. 42
  19. 62
  20. 172
  21. 26
  22. 46
  23. 16
  24. 68
  25. 19
  26. 31
  27. 23
  28. 30
  29. 132
  30. 158
  31. 26
  32. 114
  33. 12
  34. 47
  35. 81
  36. 128
  37. 24
  38. 76
  39. 32
  40. 41

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