Answer :

Let's solve the following calculation:

[tex]\( 11 + 1 + 0.01 + 0.11 + 0.111 \)[/tex]

Step-by-Step Solution:

1. Start by adding the whole numbers:
[tex]\[ 11 + 1 = 12 \][/tex]

2. Next, add the decimal numbers:
[tex]\[ 0.01 + 0.11 + 0.111 \][/tex]

3. Let's add [tex]\( 0.01 \)[/tex] and [tex]\( 0.11 \)[/tex]:
[tex]\[ 0.01 + 0.11 = 0.12 \][/tex]

4. Now, add [tex]\( 0.12 \)[/tex] and [tex]\( 0.111 \)[/tex]:
[tex]\[ 0.12 + 0.111 = 0.231 \][/tex]

5. Finally, add the sum of the whole numbers to the sum of the decimals:
[tex]\[ 12 + 0.231 = 12.231 \][/tex]

So, the final answer is [tex]\( 12.231 \)[/tex].

Thus, the correct answer is:

b. 12.231