options: Work with radicals and integer exponents.

Apply and extend previous understandings of arithmetic to algebraic expressions.

Write and interpret numerical expressions.

Add and subtract within 20.

Multiply and divide within 100.

Represent and solve problems involving addition and subtraction.

Write expressions in equivalent forms to solve problems.

Perform arithmetic operations on polynomials.

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

Rewrite rational expressions.

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

Gain familiarity with factors and multiples.

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

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

Solve systems of equations.

Represent and analyze quantitative relationships between dependent and independent variables.

Interpret the structure of expressions.

Reason about and solve one-variable equations and inequalities.

Represent and solve problems involving multiplication and division.

Use polynomial identities to solve problems.

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

Use the four operations with whole numbers to solve problems.

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

Understand the relationship between zeros and factors of polynomials.

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

Use properties of operations to generate equivalent expressions.

Create equations that describe numbers or relationships

Work with addition and subtraction equations.

Analyze patterns and relationships.

Represent and solve equations and inequalities graphically.

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

Generate and analyze patterns.

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

Solve equations and inequalities in one variable.
problem_activity: Narrative
The purpose of this Number Talk is to elicit strategies and understandings students have for adding three one-digit numbers within 20. When students look for ways to decompose addends to make a ten with another addend, and add the remaining addends to find the sum, they look for and make use of the structure of numbers and properties of operations (MP7).
Launch
Display one expression.
“Give me a signal when you have an answer and can explain how you got it.”
1 minute: quiet think time
Activity
Record answers and strategies.
Keep expressions and work displayed.
Repeat with each expression.
Student Facing
Find the value of each expression mentally.
\(6 + 4 + 8\)
\(6 + 8 + 4\)
\(6 + 8 + 5\)
\(6 + 5 + 9\)
Student Response
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Activity Synthesis
“Who can restate _____'s reasoning in a different way?”
“Did anyone have the same strategy but would explain it differently?”
“Did anyone approach the problem in a different way?”


correct_option_index: 3