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CodeSignal

Model Situations with Expressions

via CodeSignal

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Overview

You’ll turn everyday situations—like shopping, work, and travel—into expressions that represent real relationships. You’ll build expressions step by step, use grouping when needed, and recognize when different expressions represent the same situation.

Syllabus

  • Unit 1: Translate Situations into Expressions
    • From Phrases to Expressions
    • Complete Simple Expressions
    • Write Expressions From Situations
    • Match Situations To Expressions
    • Model a Rideshare Trip
  • Unit 2: Build Multi-Step Expressions
    • Assemble Fee And Rate Expressions
    • Build Multi-Step Addition Expressions
    • Turn Deduction Situations Into Expressions
    • Find The Mistakes
    • Translate an Electricity Bill into an Expression
  • Unit 3: Use Grouping to Represent Structure
    • Choose Grouped Expressions
    • Group the Repeated Combo
    • Form Grouped Expressions
    • Show Why Grouping Matters
    • Explain the Difference
  • Unit 4: Compare and Explain Equivalent Expressions
    • Connect Situations and Expressions
    • Compare Equivalent Expressions
    • Describe Equivalent Expressions in Plain Language
    • Two Perspectives on the Same Total
    • Defend Equivalent Expressions

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