Solve Decimal Subtraction: Finding the Difference Between 101.23 and 100.1

To solve this problem, we'll follow these steps:

• Align the decimal numbers vertically by placing the decimal points in the same column.
• Subtract each digit from right to left, ensuring to borrow from the next column if necessary.

Let's apply these steps to the problem:

1. Write the numbers in a vertical format:
101.23
- 100.10
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2. Start subtracting from the rightmost column.
- In the hundredths place, subtract $3 - 0$, which equals $3$.
- Move to the tenths place: subtract $2 - 1$, which equals $1$.
- Move to the ones place: $1 - 0$ equals $1$.
- Finally, in the tens place, $0 - 0$ equals $0$, and in the hundreds place, $1 - 1$ equals $0$.

3. Combine the digits we calculated by restoring the decimal point placement to get the result:
1.13

Therefore, the solution to the problem is $1.13$.