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

Perform arithmetic operations on polynomials.

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

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

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

Analyze patterns and relationships.

Create equations that describe numbers or relationships

Write expressions in equivalent forms to solve problems.

Use the four operations with whole numbers to solve problems.

Add and subtract within 20.

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

Solve equations and inequalities in one variable.

Understand the relationship between zeros and factors of polynomials.

Represent and solve problems involving multiplication and division.

Write and interpret numerical expressions.

Reason about and solve one-variable equations and inequalities.

Represent and solve equations and inequalities graphically.

Work with addition and subtraction equations.

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

Multiply and divide within 100.

Apply and extend previous understandings of arithmetic to algebraic expressions.

Solve systems of equations.

Interpret the structure of expressions.

Use properties of operations to generate equivalent expressions.

Use polynomial identities to solve problems.

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

Represent and analyze quantitative relationships between dependent and independent variables.

Gain familiarity with factors and multiples.

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

Represent and solve problems involving addition and subtraction.

Work with radicals and integer exponents.

Generate and analyze patterns.

Rewrite rational expressions.

Understand and apply properties of operations and the relationship between addition and subtraction.
problem_activity: Task
A physics professor says: "Of course, it is easy to see that
$$ L_0 \sqrt{1 - \frac{v^2}{c^2}} = 0 $$
when $v = c$."
Give a possible explanation in terms of the structure of the expression on the left why the professor might say that.
Assuming that $L_0$ and $c$ are positive, what is the greatest possible value of the expression on the left?  Explain your answer in terms of the structure of the expression.


correct_option_index: 22