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CodeSignal

Make Sense of Expressions and Inequalities

via CodeSignal

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Overview

You'll build the vocabulary and reading habits that algebraic thinking rests on. You'll learn to spot what varies in a situation, assign variables that actually mean something, read an expression part by part, and tell expressions, equations, and inequalities apart before writing any model yourself.

Syllabus

  • Unit 1: Identify What Changes
    • Spot What Stays the Same
    • Sort Quantities Across Situations
    • Define the Variable: Quantity and Units
    • Write Variable Definitions
    • Fix a Fuzzy Variable Definition
  • Unit 2: Read and Understand Expressions
    • Find Coefficients In Expressions
    • Connect Expressions to Their Stories
    • Finish The Expression Descriptions
    • What Does the Expression Mean Here?
    • Explain an Expression Simply
  • Unit 3: Differentiate Expressions, Equations, and Inequalities
    • Classify Mathematical Forms
    • Expression Equation Inequality Practice
    • Complete the Definitions
    • Compare Expressions, Equations, and Inequalities
    • Correct the Math Mistake
  • Unit 4: Decide How to Represent a Situation with Math
    • Choose the Right Math Form
    • Expression, Equation, or Inequality?
    • Fill In The Purpose And Tool
    • Justify The Math Form
    • Catch the Budget Mistake

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