游戏主要面向小学二年级，对应小学数学人教版二年级下册第七单元的知识点--正百整千数的加减。
想象过梦幻的各种奇妙的世界吗，现在开始，我们一起出发！小鸭子从此时此地搭建高楼，楼层上面有数字，
可爱的小黑从楼外探出头补充完整个算式，选择吊车上有正确答案的楼体就可以不断的升高楼层，来到各种
奇妙的世界，奇幻海洋，水果世界，蛋糕王国......我们趣动课堂的宗旨就是寓教于乐，快乐学习。
小朋友们，我们一起开始奇妙的探险吧。
The game is mainly for primary school grade two，corresponding the second grade seventh unit of
primary school mathematics of Human education--Addition and subtraction of number.Imagine all
kinds of the wonderful worlds？Now，lets go！The little duck builds a tall building from here and now.
There are numbers on the floor.Cute little black head from outside the building to complete a formula.
Choose the correct answer on the floor of the crane can continue to increase the floor and come to
all kinds of wonderful worlds,fantastic ocean,fruit world,cake Kingdom......
QD learn aims at teaching through lively activities and happy learning.