Algebra — Expressions and Equations
Algebra is generalized arithmetic — instead of 3 + 5, we write 3 + x and ask what x must be. Expressions and equations let students describe relationships compactly. Solving x + 7 = 15 by 'undoing' the addition introduces the idea of inverse operations as an algebraic tool.
What students explore
Algebra is generalized arithmetic — instead of 3 + 5, we write 3 + x and ask what x must be. Expressions and equations let students describe relationships compactly. Solving x + 7 = 15 by 'undoing' the addition introduces the idea of inverse operations as an algebraic tool.
Key ideas
Write and evaluate algebraic expressions. Identify a variable as a symbol for an unknown quantity. Solve one-step equations using inverse operations. Represent a problem situation with an equation and solve it.
Putting it together
Apply these ideas through hands-on activities, guided practice, and real-world problems.