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ALGEBRA · WORKSHEET 03
Substitution
Evaluate algebraic expressions accurately by replacing variables with positive numbers, negative numbers, fractions and decimals while following the order of operations.
30–35 minutes
Work carefully rather than rushing.
Instant marking
Use hints and explanations when needed.
You will practise
Positive valuesNegative valuesMultiple variablesPowersBracketsFractionsDecimalsFormula applications
GETTING STARTED
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Number families
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Common mistakes to remember
- Zero is whole, integer, rational and real, but it is not natural under the StudyNest convention.
- Negative integers are not whole numbers.
- Recurring decimals are rational because they can be written as fractions.
- Not every square root is irrational: simplify it first.
- A number can belong to several number families at the same time.