What is 45 x 0.1

The answer to 45 × 0.1 is 4.5.

To understand this, remember that multiplying by 0.1 is the same as finding 10% of a number. So, 10% of 45 is 4.5 because:

0.1 × 45 = 4.5.

If you have more math questions, feel free to ask for further assistance!