该应用程序是用来学习的加法。
下面是这个应用程序的描述。
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This is an application for learning Addition.
With the exercise mode, you select kind and row. And you push start button. So you are given questions.
When you answer all the questions,it is displayed correct answer and your time.
With the test mode, you select the number of question.
When you answer all the questions, it is displayed correct answer and score and your time.
When you answered all the questions correctly,you can update fastest time.
Lets learn Addition in this application.