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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 44 · 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 142 =
  2. 2.Half of 82 =
  3. 3.Double 14 =
  4. 4.Half of 104 =
  5. 5.Half of 86 =
  6. 6.Double 32 =
  7. 7.Double 87 =
  8. 8.Double 69 =
  9. 9.Half of 62 =
  10. 10.Double 42 =
  11. 11.Half of 156 =
  12. 12.Double 22 =
  13. 13.Half of 108 =
  14. 14.Double 13 =
  15. 15.Double 21 =
  16. 16.Double 43 =
  17. 17.Double 57 =
  18. 18.Double 54 =
  19. 19.Half of 128 =
  20. 20.Double 65 =
  21. 21.Double 91 =
  22. 22.Double 47 =
  23. 23.Half of 182 =
  24. 24.Double 45 =
  25. 25.Half of 162 =
  26. 26.Double 59 =
  27. 27.Double 18 =
  28. 28.Double 61 =
  29. 29.Double 36 =
  30. 30.Half of 58 =
  31. 31.Half of 72 =
  32. 32.Half of 66 =
  33. 33.Half of 48 =
  34. 34.Half of 198 =
  35. 35.Double 51 =
  36. 36.Half of 98 =
  37. 37.Double 86 =
  38. 38.Double 64 =
  39. 39.Double 33 =
  40. 40.Half of 14 =

Answer key

  1. 71
  2. 41
  3. 28
  4. 52
  5. 43
  6. 64
  7. 174
  8. 138
  9. 31
  10. 84
  11. 78
  12. 44
  13. 54
  14. 26
  15. 42
  16. 86
  17. 114
  18. 108
  19. 64
  20. 130
  21. 182
  22. 94
  23. 91
  24. 90
  25. 81
  26. 118
  27. 36
  28. 122
  29. 72
  30. 29
  31. 36
  32. 33
  33. 24
  34. 99
  35. 102
  36. 49
  37. 172
  38. 128
  39. 66
  40. 7

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