Answers

Add 42/4 and 72/45

1^st number: 10 2/4, 2^nd number: 1 27/45

42/4 + 72/45 is 121/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 45 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 4 × 45 = 180,
   42/4 = 42 × 45/4 × 45 = 1890/180
3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
   72/45 = 72 × 4/45 × 4 = 288/180
4. Add the two like fractions:
   1890/180 + 288/180 = 1890 + 288/180 = 2178/180
5. 2178/180 simplified gives 121/10
6. So, 42/4 + 72/45 = 121/10
   In mixed form: 121/10

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