Activity According to a survey conducted in 2007, there were an estimated 6.99 × 10^7 dogs, 3.61 × 10^7 cats, and 8.3 × 10^6 birds kept as pets in the United States. In this activity, you’ll add these three numbers in both standard form and in scientific notation and check whether you get the same sum.

Question 1
First, add the numbers using standard form.

Part A
Convert each of the three pet populations to standard form.

Part B
find a total population of pet dogs, cats, and birds in standard form.

Question 2
Now add the populations in scientific notation.

Part A
Rewrite each estimate so they all have the same power of 10.

Part B
Find the total population of pet dogs, cats, and birds in standard form.
Question 2 Now add the populations in scientific notation. Part A Rewrite each estimate so they all have the same power of 10.

Question 2
Now add the populations in scientific notation.

Part A
Rewrite each estimate so they all have the same power of 10.

Part B
Now that the three numbers have the same power of 10, find the sum using the Distributive Property.

Part C
Is the sum from part B in scientific notation? If not, write the sum in the scientific notation.

Question 3
Now that you’ve added the populations in two different ways, compare your results. Are the answers you found in questions 1 and 2 the same? How can you tell?​