Question

Explain how using a model can help you write a fraction with a denominater of 10 or 100 as a decimal

Answer 1

If a fraction has 10 as its denominator, then we can write its decimal expansion by putting the decimal point after one number from the left.

Example:

$\frac{325}{10} =32.5$

If a fraction has 100 as its denominator, then we can write its decimal expansion by putting the decimal point after two numbers from the left.

Example:

$\frac{1325}{100} = 13.25$