Solve for the Unknown Factor: ? × 10 = 3.3

To find the missing number that, when multiplied by 10, equals 3.3, let's follow these steps:

• Step 1: Start with the equation $x \times 10 = 3.3$.

• Step 2: To isolate $x$, divide both sides of the equation by 10:

$x = \frac{3.3}{10}$

Step 3: Perform the division. Dividing 3.3 by 10 effectively shifts the decimal point one place to the left:

$x = 0.33$

Therefore, the solution to the equation is $x = 0.33$.

This matches choice 4: $0.33$.