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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 653 · 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 43 =
  2. 2.Half of 174 =
  3. 3.Half of 92 =
  4. 4.Double 81 =
  5. 5.Half of 52 =
  6. 6.Double 96 =
  7. 7.Half of 96 =
  8. 8.Double 41 =
  9. 9.Half of 168 =
  10. 10.Double 12 =
  11. 11.Double 15 =
  12. 12.Double 21 =
  13. 13.Double 97 =
  14. 14.Half of 108 =
  15. 15.Double 75 =
  16. 16.Half of 192 =
  17. 17.Half of 188 =
  18. 18.Double 13 =
  19. 19.Half of 182 =
  20. 20.Double 14 =
  21. 21.Double 16 =
  22. 22.Half of 196 =
  23. 23.Double 87 =
  24. 24.Half of 102 =
  25. 25.Double 18 =
  26. 26.Double 64 =
  27. 27.Half of 94 =
  28. 28.Double 99 =
  29. 29.Double 23 =
  30. 30.Half of 18 =
  31. 31.Half of 134 =
  32. 32.Half of 88 =
  33. 33.Double 71 =
  34. 34.Half of 186 =
  35. 35.Half of 128 =
  36. 36.Half of 122 =
  37. 37.Double 33 =
  38. 38.Double 44 =
  39. 39.Half of 194 =
  40. 40.Half of 112 =

Answer key

  1. 86
  2. 87
  3. 46
  4. 162
  5. 26
  6. 192
  7. 48
  8. 82
  9. 84
  10. 24
  11. 30
  12. 42
  13. 194
  14. 54
  15. 150
  16. 96
  17. 94
  18. 26
  19. 91
  20. 28
  21. 32
  22. 98
  23. 174
  24. 51
  25. 36
  26. 128
  27. 47
  28. 198
  29. 46
  30. 9
  31. 67
  32. 44
  33. 142
  34. 93
  35. 64
  36. 61
  37. 66
  38. 88
  39. 97
  40. 56

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