Sum and product of rational numbers | Rational and irrational numbers | Algebra I | Khan Academy

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Learn that the sum or the product of two rational numbers is always a rational number.

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Algebra I on Khan Academy: Algebra is the language through which we describe patterns. Think of it as a shorthand, of sorts. As opposed to having to do something over and over again, algebra gives you a simple way to express that repetitive process. It's also seen as a "gatekeeper" subject. Once you achieve an understanding of algebra, the higher-level math subjects become accessible to you. Without it, it's impossible to move forward. It's used by people with lots of different jobs, like carpentry, engineering, and fashion design. In these tutorials, we'll cover a lot of ground. Some of the topics include linear equations, linear inequalities, linear functions, systems of equations, factoring expressions, quadratic expressions, exponents, functions, and ratios.

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Please explain why they make a rational together

jle
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thnx khan academy for these all things

girishkumar-hbfz
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Pls were are you other videos on rational and irrational numbers

ighotemuokoli
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This must be the case for the rationals to represent a closed set under addition and multiplication.

Clipster
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Hi, 👋 math teacher.
How are you? I am a student in the mathematics department. I need your help. If you help me, I'll be happy.😇

ssherwani
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Wait wouldn't the answer to am+bm/bn actually be bm squared?

trolljones