Question

Write the number 38,160,000 using the number word million and then round to one decimal place.

a) Thirty-eight million
b) Thirty-eight point one million
c) Thirty-eight point two million
d) Thirty-eight point three million

Answer 1

The number 38,160,000 is written as Thirty-eight million one hundred sixty thousand and rounded to one decimal place is Thirty-eight point one million.

Step-by-step explanation:

The number 38,160,000 can be written using the number word million as Thirty-eight million one hundred sixty thousand. However, when we are rounding to one decimal place, we consider only the million and the hundred-thousand place since the hundred-thousand place will determine how the million place is rounded. The hundred-thousand digit is a 1, which is less than 5, so it doesn't cause the million figure to round up.

Therefore, when rounded to one decimal place, the number becomes Thirty-eight point one million (38.1 million).