Answers

Add 21/18 and 35/70

1^st number: 1 3/18, 2^nd number: 35/70

21/18 + 35/70 is 5/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 70 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 18 × 35 = 630,
   21/18 = 21 × 35/18 × 35 = 735/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   35/70 = 35 × 9/70 × 9 = 315/630
4. Add the two like fractions:
   735/630 + 315/630 = 735 + 315/630 = 1050/630
5. 1050/630 simplified gives 5/3
6. So, 21/18 + 35/70 = 5/3
   In mixed form: 12/3

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