options: Add and subtract within 20.

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

Reason about and solve one-variable equations and inequalities.

Write expressions in equivalent forms to solve problems.

Solve equations and inequalities in one variable.

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

Generate and analyze patterns.

Gain familiarity with factors and multiples.

Represent and solve problems involving multiplication and division.

Understand the relationship between zeros and factors of polynomials.

Interpret the structure of expressions.

Use properties of operations to generate equivalent expressions.

Work with addition and subtraction equations.

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

Multiply and divide within 100.

Solve systems of equations.

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

Write and interpret numerical expressions.

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

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

Use polynomial identities to solve problems.

Perform arithmetic operations on polynomials.

Work with radicals and integer exponents.

Create equations that describe numbers or relationships

Use the four operations with whole numbers to solve problems.

Rewrite rational expressions.

Represent and solve problems involving addition and subtraction.

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

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

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

Represent and analyze quantitative relationships between dependent and independent variables.

Represent and solve equations and inequalities graphically.

Analyze patterns and relationships.

Apply and extend previous understandings of arithmetic to algebraic expressions.
problem_activity: The square below has an area of
$${20}$$
square units.
[IMG]
Taylor writes the equation
$$s^2={20}$$
to find the measure of the side length of the square. She reasons that the solution to the equation is
$$\sqrt{20}$$
and concludes that the side length of the square is
$${10}$$
units.
Do you agree with Taylor? Explain why or why not. If you disagree, include the correct side length of the square.


correct_option_index: 22