Using front-end estimation, find a reasonable estimate of: A. 7,200 B. 14,000 C. 21,000 D. 24,000

Front-end estimation is a particular way of rounding numbers to make them easier to work with. It is called front-end estimation because you keep the number in the front (the largest place value) the same and change all the other numbers (the smaller place values) to zeros.

Here's how you can do it:

A. 7,200: The largest place value is the thousands place, which is 7. So, we keep that the same and change all the other numbers to zeros. The estimate would be 7,000.

B. 14,000: The largest place value is the ten thousands place, which is 1. So, we keep that the same and change all the other numbers to zeros. The estimate would be 10,000.

C. 21,000: The largest place value is the ten thousands place, which is 2. So, we keep that the same and change all the other numbers to zeros. The estimate would be 20,000.

D. 24,000: The largest place value is the ten thousands place, which is 2. So, we keep that the same and change all the other numbers to zeros. The estimate would be 20,000.