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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 150 · 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 76 =
  3. 3.Double 85 =
  4. 4.Double 14 =
  5. 5.Half of 62 =
  6. 6.Double 87 =
  7. 7.Double 28 =
  8. 8.Half of 82 =
  9. 9.Double 25 =
  10. 10.Double 78 =
  11. 11.Half of 194 =
  12. 12.Half of 166 =
  13. 13.Double 94 =
  14. 14.Double 31 =
  15. 15.Half of 104 =
  16. 16.Double 82 =
  17. 17.Double 42 =
  18. 18.Double 91 =
  19. 19.Double 44 =
  20. 20.Half of 148 =
  21. 21.Double 63 =
  22. 22.Half of 114 =
  23. 23.Double 58 =
  24. 24.Half of 136 =
  25. 25.Double 97 =
  26. 26.Half of 52 =
  27. 27.Double 83 =
  28. 28.Double 96 =
  29. 29.Half of 134 =
  30. 30.Half of 22 =
  31. 31.Half of 98 =
  32. 32.Half of 58 =
  33. 33.Half of 46 =
  34. 34.Half of 18 =
  35. 35.Double 79 =
  36. 36.Double 49 =
  37. 37.Half of 68 =
  38. 38.Half of 174 =
  39. 39.Half of 76 =
  40. 40.Double 27 =

Answer key

  1. 52
  2. 152
  3. 170
  4. 28
  5. 31
  6. 174
  7. 56
  8. 41
  9. 50
  10. 156
  11. 97
  12. 83
  13. 188
  14. 62
  15. 52
  16. 164
  17. 84
  18. 182
  19. 88
  20. 74
  21. 126
  22. 57
  23. 116
  24. 68
  25. 194
  26. 26
  27. 166
  28. 192
  29. 67
  30. 11
  31. 49
  32. 29
  33. 23
  34. 9
  35. 158
  36. 98
  37. 34
  38. 87
  39. 38
  40. 54

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