Multiplication and Division (Grade 12 NSC Matric Mathematics): Flashcards

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Multiplication and Division
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Same signs multiply to give

Positive

Different signs multiply to give

Negative

Dividing by a fraction means

Multiply by its reciprocal

Steps to multiply algebraic fractions

Multiply numerators, multiply denominators, simplify

Distributive law formula

a(b+c)=ab+aca(b + c) = ab + ac

FOIL acronym meaning

First, Outer, Inner, Last

Negative × negative equals

Positive

Reciprocal of cd\frac{c}{d}

dc\frac{d}{c}

(a+b)(c+d)(a+b)(c+d) expanded using FOIL

ac+ad+bc+bdac + ad + bc + bd

What to do with like terms after expanding

Combine them

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