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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 527 · 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 62 =
  2. 2.Half of 122 =
  3. 3.Double 21 =
  4. 4.Half of 52 =
  5. 5.Double 94 =
  6. 6.Double 97 =
  7. 7.Double 57 =
  8. 8.Double 85 =
  9. 9.Half of 172 =
  10. 10.Half of 176 =
  11. 11.Double 18 =
  12. 12.Half of 102 =
  13. 13.Half of 22 =
  14. 14.Half of 62 =
  15. 15.Double 65 =
  16. 16.Double 42 =
  17. 17.Double 14 =
  18. 18.Double 39 =
  19. 19.Half of 198 =
  20. 20.Double 23 =
  21. 21.Half of 112 =
  22. 22.Double 98 =
  23. 23.Half of 168 =
  24. 24.Double 87 =
  25. 25.Double 26 =
  26. 26.Half of 44 =
  27. 27.Double 34 =
  28. 28.Half of 192 =
  29. 29.Double 22 =
  30. 30.Double 82 =
  31. 31.Half of 42 =
  32. 32.Double 51 =
  33. 33.Double 32 =
  34. 34.Double 11 =
  35. 35.Half of 48 =
  36. 36.Half of 84 =
  37. 37.Double 69 =
  38. 38.Double 56 =
  39. 39.Double 15 =
  40. 40.Double 43 =

Answer key

  1. 124
  2. 61
  3. 42
  4. 26
  5. 188
  6. 194
  7. 114
  8. 170
  9. 86
  10. 88
  11. 36
  12. 51
  13. 11
  14. 31
  15. 130
  16. 84
  17. 28
  18. 78
  19. 99
  20. 46
  21. 56
  22. 196
  23. 84
  24. 174
  25. 52
  26. 22
  27. 68
  28. 96
  29. 44
  30. 164
  31. 21
  32. 102
  33. 64
  34. 22
  35. 24
  36. 42
  37. 138
  38. 112
  39. 30
  40. 86

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