这个应用程序是指利用随机数以及如何将它们组合到让这个有趣的数学课程。它有一个计时器,显示你有多少时间用来回答问题。问题是加法、减法和乘法的两个数字-This application is the use of a random number and how to combine them to make this interesting mathematics curriculum. It has a timer that shows how much time you have to answ