Answers

Add 42/10 and 35/20

1^st number: 4 2/10, 2^nd number: 1 15/20

42/10 + 35/20 is 119/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 20 is 20
   
   Next, find the equivalent fraction of both fractional numbers with denominator 20
2. For the 1st fraction, since 10 × 2 = 20,
   42/10 = 42 × 2/10 × 2 = 84/20
3. Likewise, for the 2nd fraction, since 20 × 1 = 20,
   35/20 = 35 × 1/20 × 1 = 35/20
4. Add the two like fractions:
   84/20 + 35/20 = 84 + 35/20 = 119/20
5. So, 42/10 + 35/20 = 119/20
   In mixed form: 519/20

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