Answers

Add 18/3 and 54/81

1^st number: 6 0/3, 2^nd number: 54/81

18/3 + 54/81 is 20/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 3 and 81 is 81
   
   Next, find the equivalent fraction of both fractional numbers with denominator 81
2. For the 1st fraction, since 3 × 27 = 81,
   18/3 = 18 × 27/3 × 27 = 486/81
3. Likewise, for the 2nd fraction, since 81 × 1 = 81,
   54/81 = 54 × 1/81 × 1 = 54/81
4. Add the two like fractions:
   486/81 + 54/81 = 486 + 54/81 = 540/81
5. 540/81 simplified gives 20/3
6. So, 18/3 + 54/81 = 20/3
   In mixed form: 62/3

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