91Ó°ÊÓ

In the following exercises, write each number as a whole number using digits. three billion, two hundred twenty-six million, five hundred twelve thousand, seventeen

In the following exercises, write each number as a whole number using digits. eleven billion, four hundred seventy-one million, thirty-six thousand, one hundred six

In the following exercises, write each number as a whole number using digits. The population of the world was estimated to be seven billion, one hundred seventy-three million people.

In the following exercises, write each number as a whole number using digits. The age of the solar system is estimated to be four billion, five hundred sixty-eight million years.

In the following exercises, write each number as a whole number using digits. Lake Tahoe has a capacity of thirty-nine trillion gallons of water.

In the following exercises, write each number as a whole number using digits. The federal government budget was three trillion, five hundred billion dollars.

In the following exercises, round to the indicated place value. $$\begin{array}{l}{\text {Round to the nearest ten: }} \\ {\text { (a) } 386 \quad \text { (b) } 2,931}\end{array}$$

In the following exercises, round to the indicated place value. $$\begin{array}{l}{\text { Round to the nearest ten: }} \\ {\text { (a) } 792 \quad \text { ( b) } 5,647}\end{array}$$

In the following exercises, round to the indicated place value. $$\begin{array}{l}{\text { Round to the nearest }} \\ {\text { hundred: }} \\\ {\text { (a) } 13,748 \quad \text { (b) } 391,794}\end{array}$$

In the following exercises, round to the indicated place value. $$\begin{array}{l}{\text { Round to the nearest hundred: }} \\ {\text { (a) } 28,166 \quad \text { (} {b) } 481,628}\end{array}$$