A Mathematical Perspective of Ratio and Proportion
In mathematics, the concept of ratio is fundamental to many topics. Children encounter the concept in the earliest years of elementary school, even if they are not introduced to the actual word. They first learn the specific word “ratio,” in Grade 6. In fact, many sections of the elementary and middle school curriculum refer to, directly or indirectly, the concept of ratio. Price per item, fractions, percentages, probability, problems in motion, measurement, enlargement and reduction of shapes and figures, and π as a ratio between the circumference of a circle and its diameter, are just a few examples of ratios in the mathematics curriculum of elementary and middle school.
KeywordsInverse Proportion Proportional Relationship Extensive Quantity Proportional Reasoning Mathematical Perspective
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