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4p Mathematics involves understanding different types of numbers, including numbers used for ranking and + numbers that answer "how many". The + rule guides the order of operations in calculations. For instance, to solve 72 - 8 x 7 + 9, the first step is ( + ). The next step is > (after performing subtraction and addition from left to right). Numbers can be expressed as a product of their + factors, a concept related to the basic theorem of + . The numeration system we primarily use is the + system, which employs digits 0-9 and relies on place value. Concepts like factors and multiples are also fundamental. The > Common Multiple (LCM) is useful, for example, when adding unlike > where the LCM of the + is used as a common denominator. For instance, the LCM of 2 and 4 is + . Fractions can also be represented as = or > . Calculating percentages, such as 15% of 140, results in + . Furthermore, you learnt about + , which compares quantities, + , which compares different kinds of quantities, and = , which exists when two quantities have the same ratio