Question

Roberto multiplied 5.1 × 36 and wrote 1,836 as his product. Is Roberto correct? Explain your thinking.

Answer 1

No, the correct answer is 183.6
Roberto forgot when multiplying with decimals, you have to move the place value over how ever many place values are behind the two factors. In this case, there is one place value behind the decimal in 5.1
Therefore, you would have to move the decimal place value of the product over one to the left.
So, Roberto is not correct.

Answer 2

No, the answer is 183.6.

Explanation:

5.1 has 1 decimal place so the answer should have 1 decimal place.