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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 649 · 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 32 =
  2. 2.Half of 28 =
  3. 3.Double 29 =
  4. 4.Half of 182 =
  5. 5.Double 74 =
  6. 6.Half of 74 =
  7. 7.Half of 36 =
  8. 8.Half of 42 =
  9. 9.Double 21 =
  10. 10.Half of 188 =
  11. 11.Double 18 =
  12. 12.Double 14 =
  13. 13.Double 64 =
  14. 14.Double 51 =
  15. 15.Half of 158 =
  16. 16.Double 45 =
  17. 17.Double 15 =
  18. 18.Double 86 =
  19. 19.Half of 88 =
  20. 20.Half of 78 =
  21. 21.Double 31 =
  22. 22.Double 28 =
  23. 23.Half of 142 =
  24. 24.Double 13 =
  25. 25.Double 69 =
  26. 26.Half of 138 =
  27. 27.Half of 172 =
  28. 28.Double 91 =
  29. 29.Half of 176 =
  30. 30.Half of 146 =
  31. 31.Half of 12 =
  32. 32.Half of 44 =
  33. 33.Half of 166 =
  34. 34.Double 16 =
  35. 35.Double 37 =
  36. 36.Half of 112 =
  37. 37.Double 27 =
  38. 38.Double 97 =
  39. 39.Double 94 =
  40. 40.Double 98 =

Answer key

  1. 16
  2. 14
  3. 58
  4. 91
  5. 148
  6. 37
  7. 18
  8. 21
  9. 42
  10. 94
  11. 36
  12. 28
  13. 128
  14. 102
  15. 79
  16. 90
  17. 30
  18. 172
  19. 44
  20. 39
  21. 62
  22. 56
  23. 71
  24. 26
  25. 138
  26. 69
  27. 86
  28. 182
  29. 88
  30. 73
  31. 6
  32. 22
  33. 83
  34. 32
  35. 74
  36. 56
  37. 54
  38. 194
  39. 188
  40. 196

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