Types Of Number
Muhtasari
Before you can calculate confidently, it helps to know the family every number belongs to. Is it prime? A square? Rational or irrational? These labels are not just vocabulary: they tell you how a number behaves and which tools to reach for, from finding a highest common factor to simplifying a surd.
In this lesson you will sort numbers into their types, work with factors and multiples (including the highest common factor and lowest common multiple), tell rational and irrational numbers apart, and find reciprocals. This foundation underpins fractions, indices, surds and much of the number work in the rest of the course.
Malengo
- Identify and use: natural numbers integers (positive, zero and negative) prime numbers square numbers cube numbers common factors common multiples rational and irrational numbers reciprocals.
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- Which of these is a prime number? A. 1 B. 9 C. 21 D. 23 Answer: D
- What is the highest common factor (HCF) of 24 and 36? A. 6 B. 12 C. 18 D. 72 Answer: B
- What is the lowest common multiple (LCM) of 24 and 36? A. 12 B. 72 C. 144 D. 864 Answer: B
- Which of these numbers is irrational? A. 0.75 B. 1/3 C. √2 D. -5 Answer: C
- What is the reciprocal of 3/4? A. 3/4 B. 4/3 C. -3/4 D. 7/4 Answer: B
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Vitabu Vinavyopendekezwa
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Sehemu ya kitabu
Find Multiples and Factors
Identify multiples of numbers
"Prealgebra: Find Multiples and Factors" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/prealgebra/pages/2-4-find-multiples-and-factors. Access for free at https://openstax.org/books/prealgebra/pages/1-introduction
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Sehemu ya kitabu
Rational and Irrational Numbers
Identify rational numbers and irrational numbers
"Prealgebra: Rational and Irrational Numbers" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/prealgebra/pages/7-1-rational-and-irrational-numbers. Access for free at https://openstax.org/books/prealgebra/pages/1-introduction
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