C1645

"Oh? Why did Teacher Apple praise Duo Duo? "

"Duo Duo proudly puffed out her chest." This is because Duoduo's math results have improved! "

"There's improvement?" How did you improve? "

Luan Zhi was puzzled. Ever since she went to school, the smart Duoduo had always lost points in math. She did not know why, but after hearing that her math had improved, she became interested.

"Last time