Answers

Add 4/18 and 90/81

1^st number: 4/18, 2^nd number: 1 9/81

4/18 + 90/81 is 4/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 81 is 162
   
   Next, find the equivalent fraction of both fractional numbers with denominator 162
2. For the 1st fraction, since 18 × 9 = 162,
   4/18 = 4 × 9/18 × 9 = 36/162
3. Likewise, for the 2nd fraction, since 81 × 2 = 162,
   90/81 = 90 × 2/81 × 2 = 180/162
4. Add the two like fractions:
   36/162 + 180/162 = 36 + 180/162 = 216/162
5. 216/162 simplified gives 4/3
6. So, 4/18 + 90/81 = 4/3
   In mixed form: 11/3

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