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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 665 · 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 78 =
  2. 2.Double 43 =
  3. 3.Double 51 =
  4. 4.Half of 52 =
  5. 5.Double 83 =
  6. 6.Half of 188 =
  7. 7.Double 73 =
  8. 8.Double 58 =
  9. 9.Double 16 =
  10. 10.Half of 76 =
  11. 11.Double 84 =
  12. 12.Half of 92 =
  13. 13.Half of 18 =
  14. 14.Double 74 =
  15. 15.Double 91 =
  16. 16.Half of 14 =
  17. 17.Double 81 =
  18. 18.Half of 156 =
  19. 19.Double 11 =
  20. 20.Half of 86 =
  21. 21.Half of 176 =
  22. 22.Double 78 =
  23. 23.Double 27 =
  24. 24.Double 17 =
  25. 25.Double 19 =
  26. 26.Double 28 =
  27. 27.Half of 72 =
  28. 28.Double 36 =
  29. 29.Half of 88 =
  30. 30.Double 15 =
  31. 31.Double 37 =
  32. 32.Double 62 =
  33. 33.Half of 122 =
  34. 34.Half of 62 =
  35. 35.Half of 104 =
  36. 36.Half of 64 =
  37. 37.Half of 154 =
  38. 38.Double 31 =
  39. 39.Half of 182 =
  40. 40.Double 38 =

Answer key

  1. 39
  2. 86
  3. 102
  4. 26
  5. 166
  6. 94
  7. 146
  8. 116
  9. 32
  10. 38
  11. 168
  12. 46
  13. 9
  14. 148
  15. 182
  16. 7
  17. 162
  18. 78
  19. 22
  20. 43
  21. 88
  22. 156
  23. 54
  24. 34
  25. 38
  26. 56
  27. 36
  28. 72
  29. 44
  30. 30
  31. 74
  32. 124
  33. 61
  34. 31
  35. 52
  36. 32
  37. 77
  38. 62
  39. 91
  40. 76

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