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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 290 · 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 26 =
  2. 2.Double 19 =
  3. 3.Half of 198 =
  4. 4.Double 83 =
  5. 5.Double 91 =
  6. 6.Half of 72 =
  7. 7.Half of 122 =
  8. 8.Double 92 =
  9. 9.Double 61 =
  10. 10.Double 53 =
  11. 11.Double 47 =
  12. 12.Double 34 =
  13. 13.Half of 182 =
  14. 14.Half of 18 =
  15. 15.Double 31 =
  16. 16.Half of 106 =
  17. 17.Double 75 =
  18. 18.Double 76 =
  19. 19.Half of 56 =
  20. 20.Half of 192 =
  21. 21.Double 48 =
  22. 22.Half of 104 =
  23. 23.Half of 12 =
  24. 24.Half of 124 =
  25. 25.Half of 48 =
  26. 26.Double 22 =
  27. 27.Half of 54 =
  28. 28.Double 29 =
  29. 29.Half of 94 =
  30. 30.Double 51 =
  31. 31.Double 52 =
  32. 32.Double 21 =
  33. 33.Half of 92 =
  34. 34.Double 49 =
  35. 35.Double 64 =
  36. 36.Double 97 =
  37. 37.Double 69 =
  38. 38.Half of 98 =
  39. 39.Double 32 =
  40. 40.Double 15 =

Answer key

  1. 52
  2. 38
  3. 99
  4. 166
  5. 182
  6. 36
  7. 61
  8. 184
  9. 122
  10. 106
  11. 94
  12. 68
  13. 91
  14. 9
  15. 62
  16. 53
  17. 150
  18. 152
  19. 28
  20. 96
  21. 96
  22. 52
  23. 6
  24. 62
  25. 24
  26. 44
  27. 27
  28. 58
  29. 47
  30. 102
  31. 104
  32. 42
  33. 46
  34. 98
  35. 128
  36. 194
  37. 138
  38. 49
  39. 64
  40. 30

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