Solve Decimal Multiplication: 2.31 × 10 Step by Step

To solve this problem, let's multiply the decimal number $2.31$ by $10$:

• Step 1: Understanding the multiplication by 10.
  When a decimal number is multiplied by 10, we shift the decimal point one place to the right.

• Step 2: Apply the rule to $2.31$.
  The decimal point in $2.31$ is between 2 and 3. Move it one position to the right:

• Step 3: After the shift, the decimal point will be positioned after the 3, resulting in $23.1$.

Therefore, the solution to the problem $2.31 \times 10$ is $23.1$.

Among the choices given, $23.1$ corresponds to choice 1.