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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 552 · 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 42 =
  2. 2.Half of 102 =
  3. 3.Half of 12 =
  4. 4.Double 96 =
  5. 5.Double 91 =
  6. 6.Double 87 =
  7. 7.Half of 76 =
  8. 8.Half of 152 =
  9. 9.Double 25 =
  10. 10.Double 44 =
  11. 11.Double 45 =
  12. 12.Double 58 =
  13. 13.Half of 52 =
  14. 14.Half of 114 =
  15. 15.Double 48 =
  16. 16.Half of 178 =
  17. 17.Double 31 =
  18. 18.Half of 18 =
  19. 19.Double 18 =
  20. 20.Double 73 =
  21. 21.Half of 68 =
  22. 22.Double 35 =
  23. 23.Half of 56 =
  24. 24.Half of 192 =
  25. 25.Half of 26 =
  26. 26.Half of 88 =
  27. 27.Double 23 =
  28. 28.Half of 128 =
  29. 29.Half of 182 =
  30. 30.Half of 46 =
  31. 31.Double 71 =
  32. 32.Half of 124 =
  33. 33.Half of 48 =
  34. 34.Half of 16 =
  35. 35.Half of 162 =
  36. 36.Double 19 =
  37. 37.Half of 28 =
  38. 38.Half of 168 =
  39. 39.Half of 86 =
  40. 40.Half of 142 =

Answer key

  1. 21
  2. 51
  3. 6
  4. 192
  5. 182
  6. 174
  7. 38
  8. 76
  9. 50
  10. 88
  11. 90
  12. 116
  13. 26
  14. 57
  15. 96
  16. 89
  17. 62
  18. 9
  19. 36
  20. 146
  21. 34
  22. 70
  23. 28
  24. 96
  25. 13
  26. 44
  27. 46
  28. 64
  29. 91
  30. 23
  31. 142
  32. 62
  33. 24
  34. 8
  35. 81
  36. 38
  37. 14
  38. 84
  39. 43
  40. 71

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