Solve the problem. See Example 1.
Based on the 2010 Census, New York lost 2 seats in the U.S. House of Representatives. Illinois, Iowa, Missouri, and Massachusetts were among the states that the lost 1 seat. Write a signed number that represents the total change in number of seats for these five states. (Source: U.S. Census Bureau.)

Example 1 Interpreting Gains and Losses

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