Answers

Add 10/90 and 20/90

10/90 + 20/90 is 1/3.

Steps for adding fractions

1. Add the two fractions:
   10/90 + 20/90 = 10 + 20/90 = 30/90
2. 30/90 simplified gives 1/3
3. So, 10/90 + 20/90 = 1/3

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