1.50*2.90

To multiply 1.50 by 2.90, simply do the following:

1.50 × 2.90 ——— 450 (This is 1.50 multiplied by 90, without the decimal) +3000 (This is 1.50 multiplied by 2, with a zero added at the end because we’re actually multiplying by 20) ——— 4350

Now, we added the decimal point. There are two decimal places in 1.50 and two in 2.90, for a total of four decimal places when combined. However, when you look at the result (4350), it only needs to accommodate three of these places because you can't have more decimal places in the result than you have in the problem. Therefore, we need to put the decimal point three places from the right:

4.350

The final answer is:

1.50 × 2.90 = 4.35 (Note that the ending zero after the decimal point is not necessary as it does not affect the value and can be dropped.)