Read and Write Decimal Numbers

Samantha’s class is learning about the Huichol people. The class does a yarn art project as part of the lesson, using pieces of colored yarn cut to different lengths. The first piece of yarn Samantha chooses is one hundred twenty-five thousandths meters in length. Determine whether each expression represents the length of Samantha's first piece of yarn, in meters.

The expression $$5\ \times1\ +2\ \times\frac{1}{100}+7\ \times\frac{1}{1000}$$ shows a number written in expanded form.

Which of the following represents the expanded form of the decimal number 237.412?