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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 537 · 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 42 =
  2. 2.Double 19 =
  3. 3.Double 15 =
  4. 4.Double 26 =
  5. 5.Double 71 =
  6. 6.Half of 36 =
  7. 7.Double 76 =
  8. 8.Double 45 =
  9. 9.Half of 22 =
  10. 10.Half of 178 =
  11. 11.Half of 182 =
  12. 12.Double 58 =
  13. 13.Half of 92 =
  14. 14.Half of 12 =
  15. 15.Double 13 =
  16. 16.Double 83 =
  17. 17.Double 31 =
  18. 18.Double 38 =
  19. 19.Double 64 =
  20. 20.Double 66 =
  21. 21.Double 96 =
  22. 22.Half of 18 =
  23. 23.Double 88 =
  24. 24.Double 12 =
  25. 25.Half of 138 =
  26. 26.Half of 162 =
  27. 27.Half of 28 =
  28. 28.Half of 86 =
  29. 29.Half of 96 =
  30. 30.Half of 152 =
  31. 31.Half of 84 =
  32. 32.Double 95 =
  33. 33.Double 61 =
  34. 34.Double 48 =
  35. 35.Half of 124 =
  36. 36.Half of 88 =
  37. 37.Half of 136 =
  38. 38.Double 17 =
  39. 39.Double 11 =
  40. 40.Half of 34 =

Answer key

  1. 21
  2. 38
  3. 30
  4. 52
  5. 142
  6. 18
  7. 152
  8. 90
  9. 11
  10. 89
  11. 91
  12. 116
  13. 46
  14. 6
  15. 26
  16. 166
  17. 62
  18. 76
  19. 128
  20. 132
  21. 192
  22. 9
  23. 176
  24. 24
  25. 69
  26. 81
  27. 14
  28. 43
  29. 48
  30. 76
  31. 42
  32. 190
  33. 122
  34. 96
  35. 62
  36. 44
  37. 68
  38. 34
  39. 22
  40. 17

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