options: Understand and apply properties of operations and the relationship between addition and subtraction.

Represent and solve problems involving addition and subtraction.

Work with equal groups of objects to gain foundations for multiplication.

Gain familiarity with factors and multiples.

Create equations that describe numbers or relationships

Add and subtract within 20.

Represent and analyze quantitative relationships between dependent and independent variables.

Represent and solve problems involving multiplication and division.

Use the four operations with whole numbers to solve problems.

Solve systems of equations.

Write expressions in equivalent forms to solve problems.

Understand properties of multiplication and the relationship between multiplication and division.

Solve real-life and mathematical problems using numerical and algebraic expressions and equations.

Use properties of operations to generate equivalent expressions.

Work with addition and subtraction equations.

Analyze and solve linear equations and pairs of simultaneous linear equations.

Analyze patterns and relationships.

Interpret the structure of expressions.

Reason about and solve one-variable equations and inequalities.

Generate and analyze patterns.

Use polynomial identities to solve problems.

Solve problems involving the four operations, and identify and explain patterns in arithmetic.

Rewrite rational expressions.

Write and interpret numerical expressions.

Work with radicals and integer exponents.

Represent and solve equations and inequalities graphically.

Understand the relationship between zeros and factors of polynomials.

Understand the connections between proportional relationships, lines, and linear equations.

Understand solving equations as a process of reasoning and explain the reasoning.

Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.

Solve equations and inequalities in one variable.

Apply and extend previous understandings of arithmetic to algebraic expressions.

Perform arithmetic operations on polynomials.

Multiply and divide within 100.
problem_activity: Task
DVDs can be made in a factory in New Mexico at the rate of 20
DVDs per \$3, but the factory costs \$80,000 to build.
If they make 1 million DVDs, what is the unit cost per
DVD?
DVDs can be made in a factory in Colorado at the rate of 10
DVDs per \$1.50, but the factory costs \$100,000 to build.
If they make 1 million DVDs, what is the unit cost per
DVD?
How much can a buyer save on a million DVDs by buying
DVDs from  New Mexico instead of DVDs from Colorado?
Find an equation for the cost of making $x$ number of DVDs
in the factory in New Mexico.
Find an equation for the cost of making $x$ number of DVDs
in the factory in Colorado.


correct_option_index: 27