Algebraic expressions and formulas.
Read, write and evaluate expressions; explain equivalent forms; explore changing inputs in formula tables.
Work through the topic
Learn the method, follow the examples, then try the worksheet.
- 01
Variables, constants and terms
Identify the quantity that can change, fixed values and terms without needing to calculate an expression.
- 02
Mathematical notation and implied multiplication
Use short multiplication notation, powers and fraction bars without changing the operations.
- 03
Writing expressions from words
Translate words and simple situations into expressions, with the correct order of subtraction and division.
- 04
Grouping with brackets
Use brackets to keep a repeated or divided sum together and explain why their position matters.
- 05
Substituting into expressions/formulas
Substitute numerical values consistently, follow operation order and interpret formula answers with units.
- 06
Simple equivalent expressions
Combine like terms and use the structure of an expression to explain equivalence.
- 07
Varying inputs in a digital formula table
Use a stated formula to make an input-output table and check an equivalent spreadsheet rule.
Topic review
Revisit the key ideas, then choose a practice paper.