Answers

Add 42/10 and 4/81

1^st number: 4 2/10, 2^nd number: 4/81

42/10 + 4/81 is 1721/405.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 81 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 10 × 81 = 810,
   42/10 = 42 × 81/10 × 81 = 3402/810
3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
   4/81 = 4 × 10/81 × 10 = 40/810
4. Add the two like fractions:
   3402/810 + 40/810 = 3402 + 40/810 = 3442/810
5. 3442/810 simplified gives 1721/405
6. So, 42/10 + 4/81 = 1721/405
   In mixed form: 4101/405

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