根据加法运算定律，在□里填上适当的字母或数。 

（1）  69+□=130+□ 

（2）  a+（b+c）=（□+b）+c 

（3）  □+225 +275 =116+（225+□） 

（4）  149 +253 +151 +147=（149+□）+（□+147） 

（5）（245+56）+144=□+（□+□） 

（6）（52+666）+134=52+（□+□）

Read the statement and the instructions that follow it, and then make any notes that will help you plan your response. Write your response on a separate sheet of paper. If possible, type your essay on a word processor. Observe the 30-minute time limit.
The success of a company correlates directly with the average job satisfaction of its employees.
Discuss the extent to which you agree or disagree with the opinion stated above. Support your views with reasons and/or examples from your own experiences, observations, or reading.