the proficiency strands understanding, fluency, problem solving and reasoning are an part of mathematics content across the three content strands: number and algebra, measurement and geometry, and statistics and probability. the proficiencies reinforce the significance of working mathematically within the content and describe how the content is explored or developed. they provide the language to build in the developmental aspects of the learning of mathematicsat this year level:understanding includes describing the relationship between graphs and equations, simplifying a range of algebraic expressions, explaining the uses of relative frequencies to estimate probabilities, and the use of the trigonometric ratios fir ringhtt- angle triangles
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