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I'm sorry to say that I don't see any mathematical expressions. And you should translate your questions into Vietnamese so all people can answer them.
I am very sorry but I cannot see any numbers to answer your questions
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The number of students of class 5B is:
8 : (9 - 7) × 7 = 28 (students)
The number of students of class 5A is:
8 : (9 - 7) × 9 = 36 (students)
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làm thế nào mà bạn tính giá được vậy bạn có thể viết phép tính ra được không
TK
There are total 50 students in a class. Number of students absent on a particular day =14% of 50=14100×50=7 50 = 14 100 × 50 = 7 . Therefore, the number of students present =50−7=43 = 50 − 7 = 43 students.
43