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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 559 · 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 47 =
  2. 2.Half of 198 =
  3. 3.Double 39 =
  4. 4.Double 24 =
  5. 5.Half of 118 =
  6. 6.Double 32 =
  7. 7.Double 22 =
  8. 8.Half of 94 =
  9. 9.Double 73 =
  10. 10.Half of 66 =
  11. 11.Double 92 =
  12. 12.Half of 26 =
  13. 13.Double 21 =
  14. 14.Half of 46 =
  15. 15.Half of 28 =
  16. 16.Half of 152 =
  17. 17.Double 68 =
  18. 18.Half of 92 =
  19. 19.Half of 68 =
  20. 20.Half of 34 =
  21. 21.Double 95 =
  22. 22.Half of 114 =
  23. 23.Double 51 =
  24. 24.Double 75 =
  25. 25.Half of 88 =
  26. 26.Half of 134 =
  27. 27.Half of 56 =
  28. 28.Double 98 =
  29. 29.Half of 48 =
  30. 30.Double 61 =
  31. 31.Half of 108 =
  32. 32.Double 66 =
  33. 33.Double 28 =
  34. 34.Double 38 =
  35. 35.Half of 22 =
  36. 36.Double 11 =
  37. 37.Double 84 =
  38. 38.Double 83 =
  39. 39.Half of 122 =
  40. 40.Half of 42 =

Answer key

  1. 94
  2. 99
  3. 78
  4. 48
  5. 59
  6. 64
  7. 44
  8. 47
  9. 146
  10. 33
  11. 184
  12. 13
  13. 42
  14. 23
  15. 14
  16. 76
  17. 136
  18. 46
  19. 34
  20. 17
  21. 190
  22. 57
  23. 102
  24. 150
  25. 44
  26. 67
  27. 28
  28. 196
  29. 24
  30. 122
  31. 54
  32. 132
  33. 56
  34. 76
  35. 11
  36. 22
  37. 168
  38. 166
  39. 61
  40. 21

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