Fifth grade math problem solving - Training Enrollment Network

Fifth grade math problem solving

81*100 = 8100 (this is the total score of two classes)

7*49=343 (this is the plus point of B)

(8100-343)/100 = 77.57 (this is the average score of class a, because the average scores of both parties are the same at this time).

The average score of Class B is 77.57+7=84.57.

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