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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 405 · 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 122 =
  2. 2.Half of 198 =
  3. 3.Double 23 =
  4. 4.Double 94 =
  5. 5.Double 28 =
  6. 6.Half of 46 =
  7. 7.Double 36 =
  8. 8.Double 68 =
  9. 9.Half of 44 =
  10. 10.Double 61 =
  11. 11.Half of 124 =
  12. 12.Double 58 =
  13. 13.Double 51 =
  14. 14.Double 25 =
  15. 15.Half of 56 =
  16. 16.Double 37 =
  17. 17.Double 91 =
  18. 18.Half of 116 =
  19. 19.Half of 96 =
  20. 20.Half of 58 =
  21. 21.Double 12 =
  22. 22.Double 22 =
  23. 23.Half of 22 =
  24. 24.Double 16 =
  25. 25.Half of 28 =
  26. 26.Half of 176 =
  27. 27.Double 62 =
  28. 28.Double 74 =
  29. 29.Double 43 =
  30. 30.Half of 18 =
  31. 31.Half of 166 =
  32. 32.Double 88 =
  33. 33.Double 21 =
  34. 34.Double 64 =
  35. 35.Half of 152 =
  36. 36.Double 71 =
  37. 37.Double 42 =
  38. 38.Double 73 =
  39. 39.Double 65 =
  40. 40.Half of 182 =

Answer key

  1. 61
  2. 99
  3. 46
  4. 188
  5. 56
  6. 23
  7. 72
  8. 136
  9. 22
  10. 122
  11. 62
  12. 116
  13. 102
  14. 50
  15. 28
  16. 74
  17. 182
  18. 58
  19. 48
  20. 29
  21. 24
  22. 44
  23. 11
  24. 32
  25. 14
  26. 88
  27. 124
  28. 148
  29. 86
  30. 9
  31. 83
  32. 176
  33. 42
  34. 128
  35. 76
  36. 142
  37. 84
  38. 146
  39. 130
  40. 91

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