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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 678 · 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 19 =
  2. 2.Half of 104 =
  3. 3.Double 72 =
  4. 4.Double 86 =
  5. 5.Half of 32 =
  6. 6.Double 53 =
  7. 7.Half of 86 =
  8. 8.Double 57 =
  9. 9.Double 34 =
  10. 10.Double 29 =
  11. 11.Half of 146 =
  12. 12.Half of 166 =
  13. 13.Half of 154 =
  14. 14.Half of 174 =
  15. 15.Double 68 =
  16. 16.Half of 22 =
  17. 17.Double 21 =
  18. 18.Half of 124 =
  19. 19.Double 58 =
  20. 20.Double 26 =
  21. 21.Half of 122 =
  22. 22.Half of 52 =
  23. 23.Double 44 =
  24. 24.Half of 56 =
  25. 25.Double 73 =
  26. 26.Half of 184 =
  27. 27.Half of 94 =
  28. 28.Half of 138 =
  29. 29.Double 12 =
  30. 30.Double 51 =
  31. 31.Half of 128 =
  32. 32.Half of 26 =
  33. 33.Double 64 =
  34. 34.Double 82 =
  35. 35.Half of 156 =
  36. 36.Double 67 =
  37. 37.Half of 172 =
  38. 38.Half of 34 =
  39. 39.Double 24 =
  40. 40.Double 16 =

Answer key

  1. 38
  2. 52
  3. 144
  4. 172
  5. 16
  6. 106
  7. 43
  8. 114
  9. 68
  10. 58
  11. 73
  12. 83
  13. 77
  14. 87
  15. 136
  16. 11
  17. 42
  18. 62
  19. 116
  20. 52
  21. 61
  22. 26
  23. 88
  24. 28
  25. 146
  26. 92
  27. 47
  28. 69
  29. 24
  30. 102
  31. 64
  32. 13
  33. 128
  34. 164
  35. 78
  36. 134
  37. 86
  38. 17
  39. 48
  40. 32

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