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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 686 · 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 42 =
  2. 2.Half of 38 =
  3. 3.Double 72 =
  4. 4.Half of 92 =
  5. 5.Half of 198 =
  6. 6.Double 88 =
  7. 7.Double 19 =
  8. 8.Double 79 =
  9. 9.Double 18 =
  10. 10.Half of 136 =
  11. 11.Half of 108 =
  12. 12.Half of 72 =
  13. 13.Double 21 =
  14. 14.Half of 168 =
  15. 15.Double 49 =
  16. 16.Double 31 =
  17. 17.Double 34 =
  18. 18.Double 86 =
  19. 19.Half of 64 =
  20. 20.Double 68 =
  21. 21.Half of 32 =
  22. 22.Double 66 =
  23. 23.Half of 42 =
  24. 24.Double 35 =
  25. 25.Double 29 =
  26. 26.Double 39 =
  27. 27.Double 82 =
  28. 28.Half of 142 =
  29. 29.Half of 178 =
  30. 30.Double 41 =
  31. 31.Half of 144 =
  32. 32.Double 48 =
  33. 33.Double 59 =
  34. 34.Half of 104 =
  35. 35.Double 91 =
  36. 36.Half of 98 =
  37. 37.Half of 12 =
  38. 38.Half of 82 =
  39. 39.Double 53 =
  40. 40.Half of 124 =

Answer key

  1. 84
  2. 19
  3. 144
  4. 46
  5. 99
  6. 176
  7. 38
  8. 158
  9. 36
  10. 68
  11. 54
  12. 36
  13. 42
  14. 84
  15. 98
  16. 62
  17. 68
  18. 172
  19. 32
  20. 136
  21. 16
  22. 132
  23. 21
  24. 70
  25. 58
  26. 78
  27. 164
  28. 71
  29. 89
  30. 82
  31. 72
  32. 96
  33. 118
  34. 52
  35. 182
  36. 49
  37. 6
  38. 41
  39. 106
  40. 62

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