my work book is asking me to descrive how to use a ten-thousand square to round to the nearest 100

To use a ten-thousand square to round to the nearest 100, you can follow these steps:

1. Identify the place value you need to round to. In this case, you want to round to the nearest hundred, which is the third digit from the right.

2. Look at the digit to the right of the place value you want to round to. If it is 5 or greater, you will round up. If it is less than 5, you will round down.

3. Find the ten-thousand square that is closest to the number you want to round. The ten-thousand square simply means finding the largest multiple of 10,000 that is less than or equal to the number you want to round. For example, if you want to round 37,500 to the nearest hundred, the closest ten-thousand square would be 30,000.

4. Determine whether to round up or down. If the digit to the right of the hundred place is 5 or greater, you will round up. If it is less than 5, you will round down.

5. Adjust the number to the nearest hundred by replacing the digits to the right of the rounded place value with zeros. For example, if you are rounding 37,500 to the nearest hundred, and you determined you need to round up, the rounded number would be 37,600.

Remember, the purpose of using the ten-thousand square method is to help you visualize the number line and make rounding easier.