They apply their knowledge to statistics and probability. Students understand the concept of mean, median, and mode of data sets and how to calculate the range. They analyze data and sampling processes for possible bias and misleading conclusions, and they use addition and multiplication of fractions routinely to calculate probabilities for compound events. They use letters for numbers in formulas involving geometric shapes and in representing an unknown part of a ratio. They solve 1-step linear equations.
Students compare and order fractions, decimals, and mixed numbers.
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.