Introduction to algebra

Practice 5 items →

Expression, equation, formula, identity — four different kinds of sentence, and what you may do with each. Students name term, coefficient, constant, and variable, translate phrases, and evaluate expressions including at negative inputs.

Specification · for a parent or teacher

Part no.: algebra-foundations-7
Course: Advanced Math 7 · Unit 3
Realm: Structures
Difficulty: 3 of 4 — Grade 6–7 core. Multi-step, first symbolic work.
Qty: 5 items

Part no. is the node's id; the realm is the kind of math; qty is how many practice items it carries.

Students can

name term, coefficient, constant, variable; translate phrases; evaluate (including negatives); distinguish the four kinds of algebraic sentences.

Ready when

they sort four sentences into expression / equation / formula / identity and say what you are allowed to do with each.

Watch for

$x=5$ called an expression; $2(x+3)=2x+6$ called an equation to solve.

Before · requires

Algebraic expressionsalgebraic-expressions-6 · Math 6
Real numbersreals-radicals-sci-notation · Math 7

After · used by

Algebraic manipulationexpand-factor-7 · Math 7
Simple equations in one variablelinear-equations-7 · Math 7
Number patternssequences-patterns-7 · Math 7
Algebraic expressions (Math 1)algebraic-expressions-m1 · Math 1

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