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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 753 · 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 85 =
  2. 2.Half of 92 =
  3. 3.Half of 142 =
  4. 4.Double 65 =
  5. 5.Double 23 =
  6. 6.Double 19 =
  7. 7.Double 93 =
  8. 8.Double 35 =
  9. 9.Double 32 =
  10. 10.Double 75 =
  11. 11.Double 37 =
  12. 12.Double 44 =
  13. 13.Double 21 =
  14. 14.Half of 128 =
  15. 15.Half of 104 =
  16. 16.Double 96 =
  17. 17.Half of 72 =
  18. 18.Double 45 =
  19. 19.Double 61 =
  20. 20.Double 34 =
  21. 21.Double 14 =
  22. 22.Half of 96 =
  23. 23.Double 51 =
  24. 24.Double 41 =
  25. 25.Half of 16 =
  26. 26.Half of 122 =
  27. 27.Half of 172 =
  28. 28.Double 29 =
  29. 29.Double 28 =
  30. 30.Half of 44 =
  31. 31.Double 18 =
  32. 32.Half of 198 =
  33. 33.Double 26 =
  34. 34.Double 98 =
  35. 35.Double 82 =
  36. 36.Double 52 =
  37. 37.Double 83 =
  38. 38.Half of 54 =
  39. 39.Double 46 =
  40. 40.Double 66 =

Answer key

  1. 170
  2. 46
  3. 71
  4. 130
  5. 46
  6. 38
  7. 186
  8. 70
  9. 64
  10. 150
  11. 74
  12. 88
  13. 42
  14. 64
  15. 52
  16. 192
  17. 36
  18. 90
  19. 122
  20. 68
  21. 28
  22. 48
  23. 102
  24. 82
  25. 8
  26. 61
  27. 86
  28. 58
  29. 56
  30. 22
  31. 36
  32. 99
  33. 52
  34. 196
  35. 164
  36. 104
  37. 166
  38. 27
  39. 92
  40. 132

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