A bus can hold 58 students for a field trip. There are s students in the sixth grade going on the trip. There are seats left over after all of the students get on the bus. Translate the words into an expression.

Notice the phrase “left over”. We need to subtract. We are looking for the difference between s
students and 58 students on the bus. Therefore, the expression is 58 - s

If there are 46 students in the sixth grade, what is the total number remaining?

To find the total number remaining, we substitute s = 46 into the expression 58 - s.

Total number remaining = 58 - 46 = 12