standard_description: Represent addition, subtraction, multiplication, and conjugation of complex numbers geometrically on the complex plane; use properties of this representation for computation. For example, (-1 + Ö3i)^(3) = 8 because (-1 + Ö3i) has modulus 2 and argument 120°.
problem_activity: Narrative
The purpose of this Notice and Wonder is to elicit different questions from students about a story to prepare them for writing their own questions for a math story in an upcoming activity. Although students may notice and wonder many things, the most important discussion point will be the types of mathematical questions that can be asked about the story.
Launch
Groups of 2
Display the questionless story problem.
“What do you notice? What do you wonder?”
1 minute: quiet think time
Activity
“Discuss your thinking with your partner.”
1 minute: partner discussion
Share and record responses.
Student Facing
In the park, there are 37 kids on the soccer field, 18 kids on the tennis courts, and 25 kids at the picnic tables.
What do you notice? What do you wonder?
Student Response
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Activity Synthesis
“What are some mathematical questions that could be asked about this situation?”
Record responses.
“What do these questions have in common? How are they different?”


aligns: no