1
Interpret letters as numbers
Understand that letters can stand for unknown or changing numbers.
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Expressions using Letter-Numbers
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2
Use variables to describe quantities
Choose variables to represent quantities in patterns or word situations.
3
Distinguish variables from units and labels
Avoid confusing algebraic letters with measurement units or object labels.
4
Write expressions from word phrases
Translate mathematical phrases into expressions using variables.
5
Write expressions for real-life rules
Represent simple real-life rules using letter-numbers.
6
Use coefficients correctly
Understand and use forms like $3x$, $x+5$ and $2a-1$ correctly.
7
Substitute values into expressions
Evaluate algebraic expressions for given values of variables.
8
Evaluate expressions with two variables
Substitute and calculate values of expressions involving two variables.
9
Check expression values using arithmetic
Verify algebraic expression values by careful arithmetic.
10
Describe number patterns using expressions
Use variables to describe growing or repeating numerical patterns.
11
Compare algebraic expressions
Identify whether expressions are equivalent for given values.
12
Detect errors in algebraic translation
Find and correct common mistakes when translating words into expressions.
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