初中一年级1.有理数的加、减、乘、除、乘方,正数和负数,数轴,绝对值,近似数的有效数字.2.一元一次方程,二元一次方程的整数解.3.直线、射线、线段,角的度量、角的比较与运算,余角、补角、对顶角,相交线、平行线.4.三角形的边(角)关系、三角形的内角和.5.用字母表示数、合并同类项、代数式求值. The first grade of junior high school 1. The addition, subtraction, multiplication, division, and power of rational numbers, positive and negative numbers, number axes, absolute values, and effective numbers of approximate numbers. 2. One-ary-one-time equations, integers of binary equations. Lines, rays, line segments, metrics of angles, comparisons and calculations of angles, complementary angles, supplementary angles, diagonal angles, intersection lines, parallel lines. 4. Edge (angle) relations of triangles, internal angles of triangles, and .5. Letters represent numbers, combine similar items, and evaluate algebraic expressions.