Answers

Add 70/20 and 60/42

1^st number: 3 10/20, 2^nd number: 1 18/42

70/20 + 60/42 is 69/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 42 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   70/20 = 70 × 21/20 × 21 = 1470/420
3. Likewise, for the 2nd fraction, since 42 × 10 = 420,
   60/42 = 60 × 10/42 × 10 = 600/420
4. Add the two like fractions:
   1470/420 + 600/420 = 1470 + 600/420 = 2070/420
5. 2070/420 simplified gives 69/14
6. So, 70/20 + 60/42 = 69/14
   In mixed form: 413/14

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