High school mathematics is divided into: basic algebra, advanced algebra, average and rounding, arithmetic, comma, estimation and sequence, exponent, fraction and square root, geometry, graphics, basic mathematics, intermediate mathematics, advanced mathematics, measurement and so on. Learning mathematics is different from domestic mathematics. There are not so many complicated, tricky, technical and repetitive problems in China's mathematics. Mathematics abroad pays more attention to cultivating students' practical problem-solving ability. Therefore, the stem of math problems will introduce real-life situations, such as buying sugar, raising wages, calculating interest and so on. Basically, it is not difficult. Generally, the mathematics level of the first year of high school can cope with all problems. But of course, they seem to have taught calculus in high school, which we haven't learned in China. I also have a classmate who went to Denmark for a year (he is also a senior three). When he came back, it was said that he was still there for four operations. So you don't have to worry, but you still have to work hard. In this way, you will become a good student there and increase your confidence in studying abroad! Come on!