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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 442 · 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 79 =
  2. 2.Double 34 =
  3. 3.Half of 102 =
  4. 4.Half of 112 =
  5. 5.Half of 26 =
  6. 6.Double 19 =
  7. 7.Half of 176 =
  8. 8.Half of 24 =
  9. 9.Half of 194 =
  10. 10.Double 46 =
  11. 11.Half of 132 =
  12. 12.Double 63 =
  13. 13.Double 21 =
  14. 14.Double 23 =
  15. 15.Double 55 =
  16. 16.Half of 192 =
  17. 17.Double 29 =
  18. 18.Double 26 =
  19. 19.Double 91 =
  20. 20.Double 92 =
  21. 21.Double 65 =
  22. 22.Double 52 =
  23. 23.Half of 58 =
  24. 24.Double 37 =
  25. 25.Half of 156 =
  26. 26.Double 33 =
  27. 27.Double 61 =
  28. 28.Half of 92 =
  29. 29.Half of 98 =
  30. 30.Half of 42 =
  31. 31.Half of 54 =
  32. 32.Half of 182 =
  33. 33.Double 31 =
  34. 34.Double 12 =
  35. 35.Half of 84 =
  36. 36.Double 41 =
  37. 37.Half of 34 =
  38. 38.Double 53 =
  39. 39.Half of 56 =
  40. 40.Half of 28 =

Answer key

  1. 158
  2. 68
  3. 51
  4. 56
  5. 13
  6. 38
  7. 88
  8. 12
  9. 97
  10. 92
  11. 66
  12. 126
  13. 42
  14. 46
  15. 110
  16. 96
  17. 58
  18. 52
  19. 182
  20. 184
  21. 130
  22. 104
  23. 29
  24. 74
  25. 78
  26. 66
  27. 122
  28. 46
  29. 49
  30. 21
  31. 27
  32. 91
  33. 62
  34. 24
  35. 42
  36. 82
  37. 17
  38. 106
  39. 28
  40. 14

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