2,800,000,000 cubic centimeters per minute.

How many per year?

In this lesson you will learn how to estimate products of

large numbers by using scientific notation.

Let’s ReviewLet’s Review

(2 ×  104 ) (3 ×102 )

6  ×  106

2 ×  3 ×  104×102

Let’s ReviewA Common Mistake

12  ×  106(6 ×  104 ) (2 ×102 )

1.2  ×  107

Let’s ReviewCore Lesson

• About 2,800,000,000 cm3 per minute.• About 525600 minutes in a year.

How many cm3 per year?

(3 ×  109 ) (5 ×105 )15  ×  1014

1.5  ×  1015 1,500,000,000,000,0001,471,680,000,000,000

In this lesson you have learned to estimate products of large numbers by using scientific

notation.

Let’s ReviewGuided Practice

It would take about 2500 water droplets lined up side by side to reach a length of 1 inch. There are 63360 inches in a mile. Use scientific notation to estimate how many water droplets would need to be lined up to reach a length of 1 mile.

Let’s ReviewExtension Activities

Study metric system prefixes for large measurements.

Let’s ReviewExtension Activities

Positive integer powers of 10 are of three types:• “Ones” (e.g. one million)• “Tens” (e.g. ten thousand)• “Hundreds” (e.g. one hundred billion)

Is a googol a “one,” “ten,” or “hundred”?

Let’s ReviewQuick Quiz

Light travels 186,000 miles per second. There are about 525600 seconds in a year. Use scientific notation to estimate how many miles light travels in a year.

A country has a population of about 42,580,000. The country’s debt averages to $52,000 per person. Use scientific notation to estimate the country’s total debt.