Answers

Add 40/10 and 42/80

1^st number: 4 0/10, 2^nd number: 42/80

40/10 + 42/80 is 181/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 10 × 8 = 80,
   40/10 = 40 × 8/10 × 8 = 320/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   42/80 = 42 × 1/80 × 1 = 42/80
4. Add the two like fractions:
   320/80 + 42/80 = 320 + 42/80 = 362/80
5. 362/80 simplified gives 181/40
6. So, 40/10 + 42/80 = 181/40
   In mixed form: 421/40

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