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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 541 · 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 48 =
  2. 2.Half of 112 =
  3. 3.Half of 102 =
  4. 4.Double 39 =
  5. 5.Double 26 =
  6. 6.Half of 168 =
  7. 7.Double 46 =
  8. 8.Double 49 =
  9. 9.Double 24 =
  10. 10.Half of 144 =
  11. 11.Half of 166 =
  12. 12.Double 23 =
  13. 13.Half of 196 =
  14. 14.Double 65 =
  15. 15.Half of 66 =
  16. 16.Double 21 =
  17. 17.Double 61 =
  18. 18.Double 27 =
  19. 19.Double 14 =
  20. 20.Double 31 =
  21. 21.Half of 42 =
  22. 22.Half of 88 =
  23. 23.Double 92 =
  24. 24.Double 28 =
  25. 25.Double 15 =
  26. 26.Double 45 =
  27. 27.Double 71 =
  28. 28.Double 42 =
  29. 29.Half of 64 =
  30. 30.Half of 16 =
  31. 31.Half of 68 =
  32. 32.Double 36 =
  33. 33.Double 57 =
  34. 34.Double 16 =
  35. 35.Double 54 =
  36. 36.Double 74 =
  37. 37.Half of 104 =
  38. 38.Half of 124 =
  39. 39.Half of 58 =
  40. 40.Half of 132 =

Answer key

  1. 96
  2. 56
  3. 51
  4. 78
  5. 52
  6. 84
  7. 92
  8. 98
  9. 48
  10. 72
  11. 83
  12. 46
  13. 98
  14. 130
  15. 33
  16. 42
  17. 122
  18. 54
  19. 28
  20. 62
  21. 21
  22. 44
  23. 184
  24. 56
  25. 30
  26. 90
  27. 142
  28. 84
  29. 32
  30. 8
  31. 34
  32. 72
  33. 114
  34. 32
  35. 108
  36. 148
  37. 52
  38. 62
  39. 29
  40. 66

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