请朋友解答.thank you very much.

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/13 14:10:05

请朋友解答.thank you very much.
请朋友解答.thank you very much.

 


请朋友解答.thank you very much.
加号上的竖移走变减号,去把3补成9就行了,