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2. Order of operations - Wikipedia

   en.wikipedia.org/wiki/Order_of_operations

   While the first interpretation may be expected by some users due to the nature of implied multiplication, [38] the latter is more in line with the rule that multiplication and division are of equal precedence. [3] When the user is unsure how a calculator will interpret an expression, parentheses can be used to remove the ambiguity. [3]

3. Material implication (rule of inference) - Wikipedia

   en.wikipedia.org/wiki/Material_implication_(rule...

   In propositional logic, material implication [1] [2] is a valid rule of replacement that allows a conditional statement to be replaced by a disjunction in which the antecedent is negated. The rule states that P implies Q is logically equivalent to not-or and that either form can replace the other in logical proofs.

4. Pre-algebra - Wikipedia

   en.wikipedia.org/wiki/Pre-algebra

   Pre-algebra may include subjects from geometry, especially to further the understanding of algebra in applications to area and volume. Pre-algebra may also include subjects from statistics to identify probability and interpret data. Proficiency in pre-algebra is an indicator of college success. It can also be taught as a remedial course for ...

5. Expression (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Expression_(mathematics)

   Unlike with functions, notational ambiguities can be overcome by means of additional definitions (e.g., rules of precedence, associativity of the operator). For example, in the programming language C , the operator - for subtraction is left-to-right-associative , which means that a-b-c is defined as (a-b)-c , and the operator = for assignment ...

6. Law (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Law_(mathematics)

   The rules allow the expression of conjunctions and disjunctions purely in terms of each other via negation. The rules can be expressed in English as: not (A or B) = (not A) and (not B) not (A and B) = (not A) or (not B) where "A or B" is an "inclusive or" meaning at least one of A or B rather than an "exclusive or" that means exactly one of A or B.

7. Mathematical object - Wikipedia

   en.wikipedia.org/wiki/Mathematical_object

   The focus is on the manipulation of these symbols according to specified rules, rather than on the objects themselves. One common understanding of formalism takes mathematics as not a body of propositions representing an abstract piece of reality but much more akin to a game, bringing with it no more ontological commitment of objects or ...