First, define the test sites.

Then divide the process with test points.

Such as the law of additive association

23+100 = 23+89+1=11+23+99, please calculate the title: 1 1+23+89.

Test equation or application problem

Xiaoming has five pencils, Xiaohong's pencils are twice as few as Xiaoming's (seven), Xiaohua's pencils are two more than Xiaoming's and Xiaohong's (14), and three people have 26 pencils.

If one of the conditions is missing, you can do the topic: Ask Xiaoming how many pencils (x+2x-3) * 2+2 = 26. ...