500
There are 132 boys and and 148 girls signed up to go on a class field trip. The teachers make groups of 6 and then assign any remaining students to make some groups of 7. How many groups are there with 7 students? Explain how you found your answer.
4 groups.
I added 132 and 148 to get 280. Then I divided 280 by 6 to get 46 R 4. There were 4 students left over to assign, so each of 4 teams gets one more student and has 7 students.