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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 640 · 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 12 =
  2. 2.Half of 166 =
  3. 3.Double 12 =
  4. 4.Double 84 =
  5. 5.Double 78 =
  6. 6.Double 11 =
  7. 7.Double 23 =
  8. 8.Double 36 =
  9. 9.Double 34 =
  10. 10.Double 28 =
  11. 11.Double 24 =
  12. 12.Half of 192 =
  13. 13.Double 51 =
  14. 14.Half of 188 =
  15. 15.Double 92 =
  16. 16.Half of 126 =
  17. 17.Double 31 =
  18. 18.Double 38 =
  19. 19.Half of 154 =
  20. 20.Double 13 =
  21. 21.Double 55 =
  22. 22.Half of 76 =
  23. 23.Half of 52 =
  24. 24.Double 66 =
  25. 25.Double 63 =
  26. 26.Double 18 =
  27. 27.Double 26 =
  28. 28.Half of 56 =
  29. 29.Double 75 =
  30. 30.Double 14 =
  31. 31.Half of 174 =
  32. 32.Half of 104 =
  33. 33.Double 44 =
  34. 34.Double 91 =
  35. 35.Half of 92 =
  36. 36.Double 96 =
  37. 37.Half of 24 =
  38. 38.Half of 136 =
  39. 39.Half of 142 =
  40. 40.Half of 46 =

Answer key

  1. 6
  2. 83
  3. 24
  4. 168
  5. 156
  6. 22
  7. 46
  8. 72
  9. 68
  10. 56
  11. 48
  12. 96
  13. 102
  14. 94
  15. 184
  16. 63
  17. 62
  18. 76
  19. 77
  20. 26
  21. 110
  22. 38
  23. 26
  24. 132
  25. 126
  26. 36
  27. 52
  28. 28
  29. 150
  30. 28
  31. 87
  32. 52
  33. 88
  34. 182
  35. 46
  36. 192
  37. 12
  38. 68
  39. 71
  40. 23

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