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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 237 · 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 57 =
  2. 2.Double 78 =
  3. 3.Half of 188 =
  4. 4.Half of 66 =
  5. 5.Half of 32 =
  6. 6.Double 71 =
  7. 7.Double 66 =
  8. 8.Half of 26 =
  9. 9.Half of 28 =
  10. 10.Half of 108 =
  11. 11.Double 37 =
  12. 12.Double 35 =
  13. 13.Half of 22 =
  14. 14.Double 11 =
  15. 15.Double 51 =
  16. 16.Double 31 =
  17. 17.Double 87 =
  18. 18.Double 69 =
  19. 19.Double 84 =
  20. 20.Double 28 =
  21. 21.Half of 52 =
  22. 22.Double 53 =
  23. 23.Double 73 =
  24. 24.Half of 76 =
  25. 25.Double 38 =
  26. 26.Double 36 =
  27. 27.Half of 78 =
  28. 28.Double 91 =
  29. 29.Double 94 =
  30. 30.Double 12 =
  31. 31.Half of 148 =
  32. 32.Double 23 =
  33. 33.Half of 48 =
  34. 34.Half of 116 =
  35. 35.Double 16 =
  36. 36.Double 63 =
  37. 37.Double 48 =
  38. 38.Half of 44 =
  39. 39.Half of 138 =
  40. 40.Double 32 =

Answer key

  1. 114
  2. 156
  3. 94
  4. 33
  5. 16
  6. 142
  7. 132
  8. 13
  9. 14
  10. 54
  11. 74
  12. 70
  13. 11
  14. 22
  15. 102
  16. 62
  17. 174
  18. 138
  19. 168
  20. 56
  21. 26
  22. 106
  23. 146
  24. 38
  25. 76
  26. 72
  27. 39
  28. 182
  29. 188
  30. 24
  31. 74
  32. 46
  33. 24
  34. 58
  35. 32
  36. 126
  37. 96
  38. 22
  39. 69
  40. 64

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