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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 538 · 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 46 =
  2. 2.Half of 112 =
  3. 3.Double 15 =
  4. 4.Half of 116 =
  5. 5.Half of 24 =
  6. 6.Double 98 =
  7. 7.Double 91 =
  8. 8.Half of 72 =
  9. 9.Half of 32 =
  10. 10.Double 61 =
  11. 11.Half of 162 =
  12. 12.Half of 54 =
  13. 13.Half of 14 =
  14. 14.Double 85 =
  15. 15.Double 76 =
  16. 16.Half of 68 =
  17. 17.Half of 156 =
  18. 18.Double 27 =
  19. 19.Double 52 =
  20. 20.Double 84 =
  21. 21.Double 59 =
  22. 22.Half of 172 =
  23. 23.Half of 92 =
  24. 24.Double 44 =
  25. 25.Half of 98 =
  26. 26.Double 24 =
  27. 27.Half of 66 =
  28. 28.Double 88 =
  29. 29.Half of 102 =
  30. 30.Half of 22 =
  31. 31.Double 21 =
  32. 32.Double 35 =
  33. 33.Half of 158 =
  34. 34.Half of 154 =
  35. 35.Double 51 =
  36. 36.Half of 48 =
  37. 37.Half of 142 =
  38. 38.Double 18 =
  39. 39.Double 82 =
  40. 40.Half of 42 =

Answer key

  1. 23
  2. 56
  3. 30
  4. 58
  5. 12
  6. 196
  7. 182
  8. 36
  9. 16
  10. 122
  11. 81
  12. 27
  13. 7
  14. 170
  15. 152
  16. 34
  17. 78
  18. 54
  19. 104
  20. 168
  21. 118
  22. 86
  23. 46
  24. 88
  25. 49
  26. 48
  27. 33
  28. 176
  29. 51
  30. 11
  31. 42
  32. 70
  33. 79
  34. 77
  35. 102
  36. 24
  37. 71
  38. 36
  39. 164
  40. 21

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