options: Use polynomial identities to solve problems.

Perform arithmetic operations on polynomials.

Add and subtract within 20.

Write expressions in equivalent forms to solve problems.

Create equations that describe numbers or relationships

Apply and extend previous understandings of arithmetic to algebraic expressions.

Use properties of operations to generate equivalent expressions.

Analyze patterns and relationships.

Work with addition and subtraction equations.

Represent and analyze quantitative relationships between dependent and independent variables.

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

Represent and solve equations and inequalities graphically.

Work with radicals and integer exponents.

Interpret the structure of expressions.

Understand the relationship between zeros and factors of polynomials.

Solve equations and inequalities in one variable.

Write and interpret numerical expressions.

Use the four operations with whole numbers to solve problems.

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

Represent and solve problems involving addition and subtraction.

Solve systems of equations.

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

Gain familiarity with factors and multiples.

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

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

Multiply and divide within 100.

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

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

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

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

Represent and solve problems involving multiplication and division.

Reason about and solve one-variable equations and inequalities.

Generate and analyze patterns.

Rewrite rational expressions.
problem_activity: Task
The product of two positive numbers is 9. The reciprocal of one of
these numbers is 4 times the reciprocal of the other number. What is
the sum of the two numbers?


correct_option_index: 20

21