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TX.111.28.Grade 8, Adopted 2012.
Grade 8, Adopted 2012.
8.1. Mathematical process standards. The student uses mathematical processes to acquire and demonstrate mathematical understanding. The student is expected to:
8.1 (A) Apply mathematics to problems arising in everyday life, society, and the workplace.
8.1 (B) Use a problem-solving model that incorporates analyzing given information, formulating a plan or strategy, determining a solution, justifying the solution, and evaluating the problem-solving process and the reasonableness of the solution.
8.1 (C) Select tools, including real objects, manipulatives, paper and pencil, and technology as appropriate, and techniques, including mental math, estimation, and number sense as appropriate, to solve problems.
8.10. Two-dimensional shapes. The student applies mathematical process standards to develop transformational geometry concepts. The student is expected to:
8.10 (D) Model the effect on linear and area measurements of dilated two-dimensional shapes.
8.11. Measurement and data. The student applies mathematical process standards to use statistical procedures to describe data. The student is expected to:
8.11 (A) Construct a scatterplot and describe the observed data to address questions of association such as linear, non-linear, and no association between bivariate data.
8.11 (C) Simulate generating random samples of the same size from a population with known characteristics to develop the notion of a random sample being representative of the population from which it was selected.
8.12. Personal financial literacy. The student applies mathematical process standards to develop an economic way of thinking and problem solving useful in one's life as a knowledgeable consumer and investor. The student is expected to:
8.12 (D) Calculate and compare simple interest and compound interest earnings.
8.2. Number and operations. The student applies mathematical process standards to represent and use real numbers in a variety of forms. The student is expected to:
8.2 (A) Extend previous knowledge of sets and subsets using a visual representation to describe relationships between sets of real numbers.
8.2 (B) Approximate the value of an irrational number, including π and square roots of numbers less than 225, and locate that rational number approximation on a number line.
8.3. Proportionality. The student applies mathematical process standards to use proportional relationships to describe dilations. The student is expected to:
8.3 (A) Generalize that the ratio of corresponding sides of similar shapes are proportional, including a shape and its dilation.
8.3 (C) Use an algebraic representation to explain the effect of a given positive rational scale factor applied to two-dimensional figures on a coordinate plane with the origin as the center of dilation.
8.4. Proportionality. The student applies mathematical process standards to explain proportional and non-proportional relationships involving slope. The student is expected to:
8.4 (A) Use similar right triangles to develop an understanding that slope, m, given as the rate comparing the change in y-values to the change in x-values, (y2 - y1)/ (x2 - x1), is the same for any two points (x1, y1) and (x2, y2) on the same line.
Quiz, Flash Cards, Worksheet, Game & Study GuideLinear equations
8.5. Proportionality. The student applies mathematical process standards to use proportional and non-proportional relationships to develop foundational concepts of functions. The student is expected to:
8.5 (A) Represent linear proportional situations with tables, graphs, and equations in the form of y = kx.
8.6. Expressions, equations, and relationships. The student applies mathematical process standards to develop mathematical relationships and make connections to geometric formulas. The student is expected to:
8.6 (A) Describe the volume formula V = Bh of a cylinder in terms of its base area and its height.
8.7. Expressions, equations, and relationships. The student applies mathematical process standards to use geometry to solve problems. The student is expected to:
8.7 (A) Solve problems involving the volume of cylinders, cones, and spheres.
8.7 (B) Use previous knowledge of surface area to make connections to the formulas for lateral and total surface area and determine solutions for problems involving rectangular prisms, triangular prisms, and cylinders.
8.8. Expressions, equations, and relationships. The student applies mathematical process standards to use one-variable equations or inequalities in problem situations. The student is expected to:
8.8 (A) Write one-variable equations or inequalities with variables on both sides that represent problems using rational number coefficients and constants.
8.8 (C) Model and solve one-variable equations with variables on both sides of the equal sign that represent mathematical and real-world problems using rational number coefficients and constants.
Quiz, Flash Cards, Worksheet, Game & Study GuideUsing Integers
8.8 (D) Use informal arguments to establish facts about the angle sum and exterior angle of triangles, the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles.
8.9. Expressions, equations, and relationships. The student applies mathematical process standards to use multiple representations to develop foundational concepts of simultaneous linear equations. The student is expected to identify and verify the values of x