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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 383 · 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.Double 95 =
  3. 3.Double 26 =
  4. 4.Double 23 =
  5. 5.Double 41 =
  6. 6.Half of 24 =
  7. 7.Double 33 =
  8. 8.Double 87 =
  9. 9.Double 22 =
  10. 10.Half of 12 =
  11. 11.Double 62 =
  12. 12.Double 53 =
  13. 13.Half of 172 =
  14. 14.Half of 72 =
  15. 15.Half of 198 =
  16. 16.Half of 56 =
  17. 17.Half of 32 =
  18. 18.Double 78 =
  19. 19.Double 17 =
  20. 20.Half of 192 =
  21. 21.Half of 88 =
  22. 22.Half of 68 =
  23. 23.Half of 128 =
  24. 24.Half of 174 =
  25. 25.Half of 42 =
  26. 26.Half of 96 =
  27. 27.Double 85 =
  28. 28.Double 11 =
  29. 29.Double 58 =
  30. 30.Half of 106 =
  31. 31.Double 71 =
  32. 32.Double 19 =
  33. 33.Double 42 =
  34. 34.Half of 162 =
  35. 35.Half of 132 =
  36. 36.Double 21 =
  37. 37.Half of 98 =
  38. 38.Half of 152 =
  39. 39.Half of 82 =
  40. 40.Half of 124 =

Answer key

  1. 86
  2. 190
  3. 52
  4. 46
  5. 82
  6. 12
  7. 66
  8. 174
  9. 44
  10. 6
  11. 124
  12. 106
  13. 86
  14. 36
  15. 99
  16. 28
  17. 16
  18. 156
  19. 34
  20. 96
  21. 44
  22. 34
  23. 64
  24. 87
  25. 21
  26. 48
  27. 170
  28. 22
  29. 116
  30. 53
  31. 142
  32. 38
  33. 84
  34. 81
  35. 66
  36. 42
  37. 49
  38. 76
  39. 41
  40. 62

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