When we round a number to the nearest hundred we look to the tens place to tell us if we round up or down.

$\displaystyle 84{\color{Blue} 9}$

If the number in our tens place is $\displaystyle 5$ or greater, we round up. If the number in the tens place is $\displaystyle 4$ or less, we round down. When we round up, the number in the hundreds place increases by $\displaystyle 1$ and all the other numbers to the right become $\displaystyle 0$. When we round down, the number in the hundreds place stays the same and all the other numbers to the right become $\displaystyle 0$.

In this case, $\displaystyle 9$ is greater than $\displaystyle 5$ so our rounded number is $\displaystyle 850$

When we round a number to the nearest hundred we look to the tens place to tell us if we round up or down.

$\displaystyle 5{\color{Blue} 5}6$

If the number in our tens place is $\displaystyle 5$ or greater, we round up. If the number in the tens place is $\displaystyle 4$ or less, we round down. When we round up, the number in the hundreds place increases by $\displaystyle 1$ and all the other numbers to the right become $\displaystyle 0$. When we round down, the number in the hundreds place stays the same and all the other numbers to the right become $\displaystyle 0$.

In this case, $\displaystyle 5$ is equal to $\displaystyle 5$ so our rounded number is $\displaystyle 600$

When we round a number to the nearest ten we look to the ones place to tell us if we round up or down.

$\displaystyle 24\textup,41{\color{Blue} 2}$

If the number in our ones place is $\displaystyle 5$ or greater, we round up. If the number in the ones place is $\displaystyle 4$ or less, we round down. When we round up, the number in the tens place increases by $\displaystyle 1$ and all the other numbers to the right become $\displaystyle 0$. When we round down, the number in the tens place stays the same and all the other numbers to the right become $\displaystyle 0$.

In this case, $\displaystyle 2$ is less than $\displaystyle 5$ so our rounded number is $\displaystyle 24\textup,410$

When we round a number to the nearest hundred we look to the tens place to tell us if we round up or down.

$\displaystyle 236\textup,3{\color{Blue} 4}7$

If the number in our tens place is $\displaystyle 5$ or greater, we round up. If the number in the tens place is $\displaystyle 4$ or less, we round down. When we round up, the number in the hundreds place increases by $\displaystyle 1$ and all the other numbers to the right become $\displaystyle 0$. When we round down, the number in the hundreds place stays the same and all the other numbers to the right become $\displaystyle 0$.

In this case, $\displaystyle 4$ is less than $\displaystyle 5$ so our rounded number is $\displaystyle 236\textup,300$

When we round a number to the nearest ten we look to the ones place to tell us if we round up or down.

$\displaystyle 63\textup,26{\color{Blue} 7}$

If the number in our ones place is $\displaystyle 5$ or greater, we round up. If the number in the ones place is $\displaystyle 4$ or less, we round down. When we round up, the number in the tens place increases by $\displaystyle 1$ and all the other numbers to the right become $\displaystyle 0$. When we round down, the number in the tens place stays the same and all the other numbers to the right become $\displaystyle 0$.

In this case, $\displaystyle 7$ is greater than $\displaystyle 5$ so our rounded number is $\displaystyle 63\textup,270$

When we round a number to the nearest ten we look to the ones place to tell us if we round up or down.

$\displaystyle 67{\color{Blue} 1}$

If the number in our ones place is $\displaystyle 5$ or greater, we round up. If the number in the ones place is $\displaystyle 4$ or less, we round down. When we round up, the number in the tens place increases by $\displaystyle 1$ and all the other numbers to the right become $\displaystyle 0$. When we round down, the number in the tens place stays the same and all the other numbers to the right become $\displaystyle 0$.

In this case, $\displaystyle 1$ is less than $\displaystyle 5$ so our rounded number is $\displaystyle 670$.

When we round a number to the nearest ten thousand we look to the thousands place to tell us if we round up or down.

$\displaystyle 27{\color{Blue} 8}\textup,876$

If the number in our thousands place is $\displaystyle 5$ or greater, we round up. If the number in the thousands place is $\displaystyle 4$ or less, we round down. When we round up, the number in the ten thousands place increases by $\displaystyle 1$ and all the other numbers to the right become $\displaystyle 0$. When we round down, the number in the ten thousands place stays the same and all the other numbers to the right become $\displaystyle 0$.

In this case, $\displaystyle 8$ is greater than $\displaystyle 5$ so our rounded number is $\displaystyle 280\textup,000$

When we round a number to the nearest hundred we look to the tens place to tell us if we round up or down.

$\displaystyle 4\textup,6{\color{Blue} 2}3$

If the number in our tens place is $\displaystyle 5$ or greater, we round up. If the number in the tens place is $\displaystyle 4$ or less, we round down. When we round up, the number in the hundreds place increases by $\displaystyle 1$ and all the other numbers to the right become $\displaystyle 0$. When we round down, the number in the hundreds place stays the same and all the other numbers to the right become $\displaystyle 0$.

In this case, $\displaystyle 2$ is less than $\displaystyle 5$ so our rounded number is $\displaystyle 4\textup,600$

When we round a number to the nearest hundred we look to the tens place to tell us if we round up or down.

$\displaystyle 6\textup,3{\color{Blue} 7}3$

If the number in our tens place is $\displaystyle 5$ or greater, we round up. If the number in the tens place is $\displaystyle 4$ or less, we round down. When we round up, the number in the hundreds place increases by $\displaystyle 1$ and all the other numbers to the right become $\displaystyle 0$. When we round down, the number in the hundreds place stays the same and all the other numbers to the right become $\displaystyle 0$.

In this case, $\displaystyle 7$ is greater than $\displaystyle 5$ so our rounded number is $\displaystyle 6\textup,400$

When we round a number to the nearest hundred thousand we look to the ten thousands place to tell us if we round up or down.

$\displaystyle 4{\color{Blue} 6}3\textup,897$

If the number in our ten thousands place is $\displaystyle 5$ or greater, we round up. If the number in the ten thousands place is $\displaystyle 4$ or less, we round down. When we round up, the number in the hundred thousands place increases by $\displaystyle 1$ and all the other numbers to the right become $\displaystyle 0$. When we round down, the number in the hundred thousands place stays the same and all the other numbers to the right become $\displaystyle 0$.

In this case, $\displaystyle 6$ is greater than $\displaystyle 5$ so our rounded number is $\displaystyle 500\textup,000$