1.1 Numbers: Directed numbers, Types of numbers and Factors and Multiples
In this lesson, we are going to talk about: 1. Directed numbers and their practical uses 2. Types of numbers 3. Multiples and factors Directed numbers and their practical use Directed numbers are numbers we use to explain the world around us! And that includes the following: - The height of this box is 40m - The temperature outside is 18° - My phone's battery is 50.8% Types of numbers 1. Natural number - 1 and any number obtained by adding one to it repeatedly 1, 2, 3, 4, ... 2. Integer (positive, negative and zero) - A number that is not a fraction - 2, -1, 0, 1, 2, ... 3. Prime number - An integer than one that cannot be divided by any integer (other than 1 and itself) to give another integer 2, 3, 5, 7, ... 4. Composite number - A quantity expressed in two different units 5. Rational number - An integer or a fraction - 2, -⅓, 0, ¾, 1 N.B. 0.5 = ½, so 0.5 qualify to be a rational number but π doesn't qualify because it cannot be expressed as a fraction; π...