Jiao Yuanfen is the knowledge learned in the first grade of primary school, because the children in the first grade can't know the decimal point, but if they want to learn the relevant knowledge points of Jiao Yuanfen, they must first understand the relationship of Jiao Yuanfen, 1 angle = 1 angle, 1 yuan =1angle, and 5 yuan is still equal to 5 yuan, but it is replaced with/. When calculating practical problems, we only need to follow the principle of adding points, adding angles and Canadian dollars, and finally add them together. Only by combining RMB with calculation in life can we make these knowledge "live" in children's minds, let children identify and compare them in experience, and deepen the impression of these behavioral goals in their minds, so as to achieve the purpose of learning and flexible use.