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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 114 · 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 122 =
  2. 2.Half of 152 =
  3. 3.Double 42 =
  4. 4.Double 37 =
  5. 5.Double 66 =
  6. 6.Double 84 =
  7. 7.Half of 192 =
  8. 8.Half of 92 =
  9. 9.Double 25 =
  10. 10.Double 99 =
  11. 11.Double 64 =
  12. 12.Half of 52 =
  13. 13.Double 54 =
  14. 14.Half of 182 =
  15. 15.Double 44 =
  16. 16.Double 81 =
  17. 17.Half of 28 =
  18. 18.Double 88 =
  19. 19.Double 94 =
  20. 20.Half of 138 =
  21. 21.Double 82 =
  22. 22.Half of 24 =
  23. 23.Half of 64 =
  24. 24.Double 79 =
  25. 25.Double 92 =
  26. 26.Half of 178 =
  27. 27.Double 14 =
  28. 28.Double 63 =
  29. 29.Half of 44 =
  30. 30.Half of 22 =
  31. 31.Half of 58 =
  32. 32.Half of 142 =
  33. 33.Half of 84 =
  34. 34.Double 86 =
  35. 35.Double 85 =
  36. 36.Double 91 =
  37. 37.Double 52 =
  38. 38.Half of 106 =
  39. 39.Half of 34 =
  40. 40.Double 21 =

Answer key

  1. 61
  2. 76
  3. 84
  4. 74
  5. 132
  6. 168
  7. 96
  8. 46
  9. 50
  10. 198
  11. 128
  12. 26
  13. 108
  14. 91
  15. 88
  16. 162
  17. 14
  18. 176
  19. 188
  20. 69
  21. 164
  22. 12
  23. 32
  24. 158
  25. 184
  26. 89
  27. 28
  28. 126
  29. 22
  30. 11
  31. 29
  32. 71
  33. 42
  34. 172
  35. 170
  36. 182
  37. 104
  38. 53
  39. 17
  40. 42

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