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初等代数/比例和比例推理/章节复习

来自维基教科书,一个开放世界的开放书籍

Lesson 1. Proportions

Lesson 2. Percents

Lesson 3. Percent of Change

Lesson 4. Weighted Averages

Lesson 5. Direct and Inverse Variation

Lesson 6. Solving Similar Triangles using Proportions

华夏公益教科书