The students in Mrs. Krager's class are holding a car wash to raise money for their end-of-year field trip. They washed 45 cars by noon, and their goal is to wash 110 cars by the end of the day. Write and solve an addition equation to find c, the number of cars they still need to wash to meet their goal.
Let's see your attempt to deal with these problems. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.
To find the number of cars they still need to wash, we can subtract the number of cars they have already washed from their goal.
Let's write an addition equation for this:
c (number of cars they still need to wash) = 110 (goal) - 45 (number of cars washed by noon)
To solve this equation, subtract 45 from 110:
c = 110 - 45
c = 65
Therefore, the students still need to wash 65 cars to meet their goal of washing 110 cars by the end of the day.