Ursula wrote the sum 5.815 + 6.021 as a sum of two mixed numbers.

Question

A. What sum did she write?
B. Compare the sum of the mixed numbers to the sum of the decimals.

Answer 1

.815 = 815/1000
.021 = 21/1000

So, she added thusly:

5 815/1000 + 6 21/1000 = 11 876/1000 = 11 219/250