They solve problems involving fractions, ratios, proportions, and percentages. Use cross-multiplication as a method for solving such problems, understanding it as multiplication of both sides of an equation by a multiplicative inverse. 1.4 calculate given percentages of quantities and solve problems involving discounts at sales, interest earned and tips 2. Students calculate and solve problems involving addition, subtraction, multiplication and division of rational numbers. 2.3 solve addition, subtraction, multiplication and division problems, including those arising in concrete situations that use positive and negative numbers and combinations of these operations 2.4 determine the least common multiple and greatest common divisor of whole numbers.
Students analyze and use tables, graphs and rules to solve problems involving rates and proportions.
Students investigate geometric patterns and describe them algebraically. Students deepen their understanding of measurement of plane and solid shapes and use this understanding to solve problems. Students identify and describe the properties of two-dimensional figures. Students compute and analyze statistical measurement for data sets. Students use data samples of a population and describe the characteristics and limitations of the samples.