*Grade level: 4th – 5th grades*

*Skills: Addition and Subtraction*

*Related environmental issues: Energy*

*Area level: National, state*

The table below shows the average wind power generation per person (per capita wind power) in top 5 states with wind power generation in 2015.

- What is the difference between the largest and the smallest numbers?
- Is per capita wind power in Texas larger than per capita wind power in California and Illinois combined? If so, by how many watts? If not, by how many watts?
- Is per capita wind power in Iowa larger than per capita wind power in Texas, Oklahoma, and Illinois combined? If so, by how many watts? If not, by how many watts?
- What is the difference between per capita wind power in Oklahoma and California?

Source: U.S. Department of Energy, 2015. Installed Wind Capacity & United States Census Bureau

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Answer keys

- 1,723 (1,838 – 115 = 721)
- Yes: Larger by 156 watts (155 + 298 = 453 ; 609 – 453 = 156)
- No: Smaller by 186 watts (609 + 1,117 + 298 = 2,024 ; 2,024 – 1,838 = 186)
- 962 (1,117 – 155 = 962)