Current location - Training Enrollment Network - Mathematics courses - The second volume of the second grade, Mathematics Beijing Normal University Edition, page 44, question 5, what number can you fill in?
The second volume of the second grade, Mathematics Beijing Normal University Edition, page 44, question 5, what number can you fill in?
23 people donated money, so 40-23= 17 people didn't donate.
So these 17 people are all people who donate school supplies.
* * * 28 people donated school supplies, so 28- 17= 1 1 person,
This 1 1 person is a student who donated money and school supplies.