Answers

Add 80/18 and 54/70

1^st number: 4 8/18, 2^nd number: 54/70

80/18 + 54/70 is 1643/315.

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,
   80/18 = 80 × 35/18 × 35 = 2800/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   54/70 = 54 × 9/70 × 9 = 486/630
4. Add the two like fractions:
   2800/630 + 486/630 = 2800 + 486/630 = 3286/630
5. 3286/630 simplified gives 1643/315
6. So, 80/18 + 54/70 = 1643/315
   In mixed form: 568/315

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