Algebra › Section A · Foundations › Topic A.2
Integers, fractions, and decimals
Before algebra can do anything interesting with letters, it has to be rock-solid on numbers. This review sharpens the three arithmetic skills every later topic stands on: computing with signed numbers, fractions and decimals.
In this topic
- The numbers algebra runs on
- Opposites and absolute value
- Adding and subtracting signed numbers
- Multiplying and dividing signed numbers
- Worked example: evaluating an expression with integers
- Multiplying and dividing fractions
- Adding and subtracting fractions
- Decimals: rounding and the four operations
- Decimals, fractions, and percents
- Worked example: a bank balance through a busy week
- Common mistakes to avoid
- Key takeaways
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