Question

1. subtract 9.12 from 23.08.

13.94
14.04
13.96
32.2

Explanation:

Step1: Set up subtraction

We need to calculate \(23.08 - 9.12\).

Step2: Subtract decimals

Align the decimal points:
\[

$$\begin{align*} 23.08\\ - \ 9.12\\ \hline \end{align*}$$

\]
Subtract the hundredths place: \(8 - 2 = 6\).
Subtract the tenths place: We can't do \(0 - 1\), so we borrow 1 from the ones place. The 3 in the ones place becomes 2, and the 0 in the tenths place becomes 10. Now we have \(10 - 1 = 9\) in the tenths place.
Subtract the ones place: \(2 - 9\) is not possible, so we borrow 1 from the tens place. The 2 in the tens place becomes 1, and the 2 in the ones place becomes 12. Now \(12 - 9 = 3\) in the ones place.
Subtract the tens place: \(1 - 0 = 1\) (but since we are dealing with numbers less than 20 in the ones and tenths, the tens place result is 1, but combined with the other digits we have \(13.96\)).
So \(23.08 - 9.12 = 13.96\).

Answer:

13.96 (corresponding to the option "13.96")