Xiao Ming, Xiao Hong and Xiao Jun did math problems. It is known that Xiaoming has done 6 more questions than Xiaohong, Xiaojun has done 2 more questions than Xiaoming and 22 more questions than Xiaohong. How many questions did three people do?

Primary school thought:

Xiao Ming has done 6 times more than Xiao Hong, 2 times more than Xiao Hong, and 22 more questions, which will not change, so Xiao Ming has done 22-6 times more, which is 16, so Xiao Hong is 16 = 18, and Xiao Jun is 16 *.

Junior high school thought:

Set an unknown number, Xiaoming X Road, Xiaohong Y Road and Xiaojun Z Road, depending on the meaning of the question.

X-y=6, z=2x, z-y=22, three ternary linear equations, simple and easy to solve.

x= 16，y= 10，z=32。 x+y+z=58