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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 510 · 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 71 =
  2. 2.Double 89 =
  3. 3.Half of 102 =
  4. 4.Double 36 =
  5. 5.Double 13 =
  6. 6.Double 45 =
  7. 7.Half of 14 =
  8. 8.Half of 132 =
  9. 9.Half of 18 =
  10. 10.Half of 64 =
  11. 11.Double 33 =
  12. 12.Double 56 =
  13. 13.Double 27 =
  14. 14.Half of 88 =
  15. 15.Half of 92 =
  16. 16.Double 23 =
  17. 17.Half of 124 =
  18. 18.Half of 168 =
  19. 19.Half of 72 =
  20. 20.Double 16 =
  21. 21.Double 24 =
  22. 22.Half of 186 =
  23. 23.Half of 182 =
  24. 24.Half of 116 =
  25. 25.Half of 148 =
  26. 26.Double 32 =
  27. 27.Double 48 =
  28. 28.Double 46 =
  29. 29.Double 11 =
  30. 30.Half of 152 =
  31. 31.Double 72 =
  32. 32.Double 79 =
  33. 33.Half of 176 =
  34. 34.Half of 106 =
  35. 35.Half of 12 =
  36. 36.Double 19 =
  37. 37.Double 91 =
  38. 38.Half of 122 =
  39. 39.Half of 46 =
  40. 40.Double 22 =

Answer key

  1. 142
  2. 178
  3. 51
  4. 72
  5. 26
  6. 90
  7. 7
  8. 66
  9. 9
  10. 32
  11. 66
  12. 112
  13. 54
  14. 44
  15. 46
  16. 46
  17. 62
  18. 84
  19. 36
  20. 32
  21. 48
  22. 93
  23. 91
  24. 58
  25. 74
  26. 64
  27. 96
  28. 92
  29. 22
  30. 76
  31. 144
  32. 158
  33. 88
  34. 53
  35. 6
  36. 38
  37. 182
  38. 61
  39. 23
  40. 44

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