options: Represent and solve problems involving addition and subtraction.

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

Generate and analyze patterns.

Understand the relationship between zeros and factors of polynomials.

Solve systems of equations.

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

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

Use the four operations with whole numbers to solve problems.

Represent and solve equations and inequalities graphically.

Work with addition and subtraction equations.

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

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

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

Perform arithmetic operations on polynomials.

Work with radicals and integer exponents.

Add and subtract within 20.

Write and interpret numerical expressions.

Solve equations and inequalities in one variable.

Multiply and divide within 100.

Represent and analyze quantitative relationships between dependent and independent variables.

Use polynomial identities to solve problems.

Reason about and solve one-variable equations and inequalities.

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

Analyze patterns and relationships.

Create equations that describe numbers or relationships

Apply and extend previous understandings of arithmetic to algebraic expressions.

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

Rewrite rational expressions.

Use properties of operations to generate equivalent expressions.

Gain familiarity with factors and multiples.

Represent and solve problems involving multiplication and division.

Write expressions in equivalent forms to solve problems.

Interpret the structure of expressions.

Solve real-life and mathematical problems using numerical and algebraic expressions and equations.
problem_activity: Narrative
The purpose of this activity is for students to choose from activities that offer practice working with two-digit numbers. Students choose from any stage of previously introduced centers.
Write Numbers
Grab and Count
Five in a Row
Required Materials
Materials to Gather
Materials from previous centers
Required Preparation
Gather materials from previous centers:
Write Numbers, Stages 1 and 2
Grab and count, Stage 2
Five in a Row, Stages 1–3
Launch
Groups of 2
“Now you are going to choose from centers we have already learned.”
Display the center choices in the student book.
“Think about what you would like to do.”
30 seconds: quiet think time
Activity
Invite students to work at the center of their choice.
10 minutes: center work time
Student Facing
Choose a center.
Write Numbers
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Grab and Count
[IMG]
Five in a Row
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Activity Synthesis
“Mai is playing Grab and Count with her partner. She organized her cubes into 4 towers of 10 and 3 ones. Her partner organized her cubes into 2 towers of 10. How many cubes do they have together?”


correct_option_index: 15