Answers

Add 1/10 and 81/40

1^st number: 1/10, 2^nd number: 2 1/40

1/10 + 81/40 is 17/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 40 is 40
   
   Next, find the equivalent fraction of both fractional numbers with denominator 40
2. For the 1st fraction, since 10 × 4 = 40,
   1/10 = 1 × 4/10 × 4 = 4/40
3. Likewise, for the 2nd fraction, since 40 × 1 = 40,
   81/40 = 81 × 1/40 × 1 = 81/40
4. Add the two like fractions:
   4/40 + 81/40 = 4 + 81/40 = 85/40
5. 85/40 simplified gives 17/8
6. So, 1/10 + 81/40 = 17/8
   In mixed form: 21/8

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