Primary school must see! Is swinging a phenomenon of translation or rotation?

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

Primary school must see! Swing Yes

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[Initial release] It has been stable for three years without advertising video analysis interface. The significance of film and television: film is a continuous image developed by the combination of activity photography and slide projection, a modern art of vision and hearing, and also a

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Primary school must see! Swing Yes

Primary school must see! Swing Yes

Primary school must see! Swing Yes

Primary school must see! Swing Yes

Primary school must see!

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