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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 375 · 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 196 =
  2. 2.Double 13 =
  3. 3.Double 15 =
  4. 4.Half of 102 =
  5. 5.Half of 64 =
  6. 6.Double 12 =
  7. 7.Double 19 =
  8. 8.Double 85 =
  9. 9.Half of 176 =
  10. 10.Double 64 =
  11. 11.Double 57 =
  12. 12.Double 42 =
  13. 13.Half of 52 =
  14. 14.Half of 56 =
  15. 15.Half of 98 =
  16. 16.Half of 178 =
  17. 17.Double 81 =
  18. 18.Half of 16 =
  19. 19.Double 28 =
  20. 20.Half of 22 =
  21. 21.Half of 132 =
  22. 22.Double 31 =
  23. 23.Half of 142 =
  24. 24.Double 33 =
  25. 25.Half of 92 =
  26. 26.Half of 124 =
  27. 27.Half of 26 =
  28. 28.Double 26 =
  29. 29.Double 32 =
  30. 30.Half of 74 =
  31. 31.Double 88 =
  32. 32.Half of 36 =
  33. 33.Half of 116 =
  34. 34.Half of 172 =
  35. 35.Half of 32 =
  36. 36.Half of 122 =
  37. 37.Double 52 =
  38. 38.Double 87 =
  39. 39.Double 71 =
  40. 40.Half of 68 =

Answer key

  1. 98
  2. 26
  3. 30
  4. 51
  5. 32
  6. 24
  7. 38
  8. 170
  9. 88
  10. 128
  11. 114
  12. 84
  13. 26
  14. 28
  15. 49
  16. 89
  17. 162
  18. 8
  19. 56
  20. 11
  21. 66
  22. 62
  23. 71
  24. 66
  25. 46
  26. 62
  27. 13
  28. 52
  29. 64
  30. 37
  31. 176
  32. 18
  33. 58
  34. 86
  35. 16
  36. 61
  37. 104
  38. 174
  39. 142
  40. 34

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