Beginner Topic 1 of 51 Math for Computing
Number Systems
Naturals, integers, rationals and reals.
How it works
Naturals ℕ, integers ℤ, rationals ℚ, reals ℝ and complex ℂ nest inside each other; computers approximate ℝ with floats and ℤ with fixed-width ints.
Where it is used
Choosing data types.
Common pitfall
Irrational numbers like √2 cannot be represented exactly.
Where it fits in the course
Number Systems is topic 1 of 51 in Math for Computing, rated Beginner. It is the first topic in this area. The next topic is Algebra Review.
Practice and explore
- Open the interactive lesson, with a mini quiz.
- Take the Math for Computing quiz.
How to study this topic
- Read the explanation above and restate the definition in your own words.
- Open the interactive lesson and answer its mini quiz.
- Read the common pitfall, then write a short example that avoids it.
- Check your understanding in the Math for Computing quiz, and revisit the topic if you miss a question.
Frequently asked questions
What is Number Systems?
Naturals, integers, rationals and reals. It belongs to Math for Computing and is a beginner-level topic.
Where do people use Number Systems?
Choosing data types.
What is the most common mistake with Number Systems?
Irrational numbers like √2 cannot be represented exactly.
What should I learn before this topic?
Nothing earlier in Math for Computing is required. This is where the area begins.
How can I practice it?
Answer the mini quiz in the interactive lesson, then take the Math for Computing quiz.
Is Number Systems hard to learn?
It is a Beginner topic, so it works as an entry point. If the terms are new, read the explanation twice and try the visualizer before the quiz.
How long does it take to learn Number Systems?
Most learners can read the explanation and finish the interactive lesson in under an hour. Fluency comes from applying the idea, so plan a few short practice sessions with the quiz.
Which topics are related to Number Systems?
Algebra Review, Exponents and Logarithms, Summations and Series are closely connected. The full list is in the related topics section of this page.
What should I study after Number Systems?
Continue with Algebra Review, the next topic in Math for Computing.
Related topics
- Algebra Review (Math for Computing)
- Exponents and Logarithms (Math for Computing)
- Summations and Series (Math for Computing)
- Functions and Graphs (Math for Computing)
- Binary Number System (Computer Architecture & Logic)
- Peer-to-Peer Systems (Distributed Systems & Cloud)
- Coordinate Systems (Graphics, Vision & Media)