Car Facts- Addition with Decimals

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In 1980 average passenger cars got 15.46 miles per gallon. Also in 1980 all motor vehicles got 13.29 miles per gallon. What is the sum?

In 1985 average passenger cars got 18.20 miles per gallon. Also in 1985 all motor vehicles got 14.62 miles per gallon. What is the sum?

In 1989 average passenger cars got 20.31 miles per gallon. Also in 1989 all motor vehicles got 15.90 miles per gallon. What is the sum?

In 1990 average passenger cars got 21.02 miles per gallon. Also in 1990 all motor vehicles got 16.40 miles per gallon. What is the sum?

In 1992 average passenger cars got 21.68 miles per gallon. Also in 1992 all motor vehicles got 16.91 miles per gallon. What is the sum?

In 1993 average passenger cars got 21.04 miles per gallon. Also in 1993 all motor vehicles got 16.73 miles per gallon. What is the sum?

In 1994 average passenger cars got 21.48 miles per gallon. Also in 1994 all motor vehicles got 16.83 miles per gallon. What is the sum?

In 1996 average passenger cars got 22.56 miles per gallon. Also in 1996 all motor vehicles got 16.90 miles per gallon. What is the sum?

In 1992 the average passenger car used 21.68 gallons of gas per mile and in 1980 it used 13.29 gallons og gas per mile. What is the sum?

In 1980 all motor vehicles used 13.29 gallons of gas per mile, and in 1989 all motor vehicles used 15.90 gallons of gas per mile. What is the sum?