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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 493 · 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 31 =
  2. 2.Double 95 =
  3. 3.Double 67 =
  4. 4.Half of 86 =
  5. 5.Double 17 =
  6. 6.Double 85 =
  7. 7.Double 44 =
  8. 8.Double 86 =
  9. 9.Double 26 =
  10. 10.Half of 42 =
  11. 11.Double 52 =
  12. 12.Double 76 =
  13. 13.Double 55 =
  14. 14.Double 23 =
  15. 15.Half of 142 =
  16. 16.Half of 132 =
  17. 17.Half of 98 =
  18. 18.Half of 108 =
  19. 19.Double 43 =
  20. 20.Half of 162 =
  21. 21.Double 79 =
  22. 22.Half of 172 =
  23. 23.Double 92 =
  24. 24.Half of 18 =
  25. 25.Double 18 =
  26. 26.Double 19 =
  27. 27.Half of 28 =
  28. 28.Double 91 =
  29. 29.Double 36 =
  30. 30.Half of 188 =
  31. 31.Half of 52 =
  32. 32.Double 81 =
  33. 33.Half of 14 =
  34. 34.Half of 114 =
  35. 35.Double 74 =
  36. 36.Half of 32 =
  37. 37.Half of 54 =
  38. 38.Double 47 =
  39. 39.Half of 112 =
  40. 40.Half of 116 =

Answer key

  1. 62
  2. 190
  3. 134
  4. 43
  5. 34
  6. 170
  7. 88
  8. 172
  9. 52
  10. 21
  11. 104
  12. 152
  13. 110
  14. 46
  15. 71
  16. 66
  17. 49
  18. 54
  19. 86
  20. 81
  21. 158
  22. 86
  23. 184
  24. 9
  25. 36
  26. 38
  27. 14
  28. 182
  29. 72
  30. 94
  31. 26
  32. 162
  33. 7
  34. 57
  35. 148
  36. 16
  37. 27
  38. 94
  39. 56
  40. 58

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