By mastering the operation skills of 2 1 point, students can greatly mobilize the coordinated activities of eyes, brain, hands, mouth and ears, which is very helpful to cultivate children's rapid mental arithmetic ability and reaction ability. It is very useful for students' mathematical thinking.
At first, students will feel a little overwhelmed, but after later training, children will be able to handle it with ease.
In the later stage, we mainly start with children's thinking, cultivate children's mental arithmetic ability and improve their four arithmetic abilities.