Question

Which model shows the correct expression and solution to 0.3×0.4
?

Answer 1

To find the product of 0.3 and 0.4, you can follow these steps:

1. **Multiply the numbers as if they were whole numbers**:
\[
3 \times 4 = 12
\]

2. **Count the total number of decimal places in the original numbers**:
- 0.3 has 1 decimal place.
- 0.4 has 1 decimal place.
- In total, there are 2 decimal places.

3. **Place the decimal point in the result**:
- Since we have 12 from our multiplication and need to account for 2 decimal places, we place the decimal point two places from the right:
\[
0.12
\]

Thus, the correct expression and solution for \(0.3 \times 0.4\) is:

\[
\boxed{0.12}
\]