B (23x5)-s
1) Gathering the data:
5 6th grade classes of 23 students
S= absent students
2) Since S represent the absent students. The question is How many went to the museum.
Then the expression that represents the absent students
is
5 classes of 23 students:
(23 x 5)
Minus the number of absent students, so:
(23x5)-s