Answers

Add 70/20 and 63/45

1^st number: 3 10/20, 2^nd number: 1 18/45

70/20 + 63/45 is 49/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 45 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   70/20 = 70 × 9/20 × 9 = 630/180
3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
   63/45 = 63 × 4/45 × 4 = 252/180
4. Add the two like fractions:
   630/180 + 252/180 = 630 + 252/180 = 882/180
5. 882/180 simplified gives 49/10
6. So, 70/20 + 63/45 = 49/10
   In mixed form: 49/10

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