standard_description: Understand that a function from one set (called the domain) to another set (called the range) assigns to each element of the domain exactly one element of the range. If f is a function and x is an element of its domain, then f(x) denotes the output of f corresponding to the input x. The graph of f is the graph of the equation y = f(x).
problem_activity: Narrative
The purpose of this True or False is to elicit the strategies and understandings students have for explaining why an equation is true based on place value. These understandings will be helpful later when students need to find ways to make equations true by attending to place value.
Launch
Display one statement.
“Give me a signal when you know whether the statement is true and can explain how you know.”
1 minute: quiet think time
Activity
Share and record answers and strategies.
Repeat with each statement.
Student Facing
Decide if each statement true or false. Be prepared to explain your reasoning.
5 hundreds + 2 tens + 7 ones = 527
4 hundreds + 12 tens + 7 ones = 527
5 hundreds + 7 ones + 2 tens = 527
Student Response
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Activity Synthesis
“What other ways could we write an expression that has a value of 527?”


aligns: no