Answers

Add 18/60 and 21/60

18/60 + 21/60 is 13/20.

Steps for adding fractions

1. Add the two fractions:
   18/60 + 21/60 = 18 + 21/60 = 39/60
2. 39/60 simplified gives 13/20
3. So, 18/60 + 21/60 = 13/20

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