1. In 2012, the population of NY was about 2.4 x 10^7 and the population of Oregon was 4 x 10^5.

How many more people live in NY than in Oregon?

2. 4.29 x 10^6 - 1.68 x 10^6=

3. 5.08 x 10^-4 - 3.12 x 10^-5=


4.

A. 6 x 10^4 - 8 x 10^2=

B. 6 x 10^4 - 0.08 x 10^4=

5. In problem 4, what do you notice between the two answers?

1 answer

1. Population of NY = 2.4 x 10^7
Population of Oregon = 4 x 10^5

Difference = (2.4 x 10^7) - (4 x 10^5)
= 24,000,000 - 400,000
= 23,600,000

Therefore, 23,600,000 more people live in NY than in Oregon.

2. 4.29 x 10^6 - 1.68 x 10^6 = 2.61 x 10^6

3. 5.08 x 10^-4 - 3.12 x 10^-5 = 4.76 x 10^-4

4. A. 6 x 10^4 - 8 x 10^2 = 5.92 x 10^4

B. 6 x 10^4 - 0.08 x 10^4 = 5.92 x 10^4

5. In problem 4, we notice that the answers for part A and part B are the same. This is because the subtraction in part B results in the same value as part A, just expressed in scientific notation differently.