Primary school must see! Swing Yes
The content of Unit 3 of Mathematics in Volume 1 of Grade 3 is the movement of figures (I). Students need to simply understand the translation and rotation of figures. Figures are more abstract than numbers, and some children don't understand them. The key is that the concept must be clear. Translating refers to moving all points on a figure the same distance in a straight line direction in a plane. Such graphic motion is called the translational motion of a figure. For example, the switch of the elevator door, the up and down movement of the elevator
