Middle School Maths: Number

Factors

All numbers which divide evenly into a number

HCF

Largest factors common to two or more numbers

Multiples

Result of multiplying a number by any other natural number

LCM

Smallest multiple common to two or more numbers

Multiplication rules

+ mulitplied by + = +

+ mulitplied by - = -

- mulitplied by + = -

- mulitplied by - = +

Divsion rules

+ divided by + = +

+ divided by - = -

- divided by + = -

- divided by - = +

Order of operations

BEDMAS

Types

Proper

Numerator smaller than denominator

Improper

Numerator larger than denominator

Mixed Number

Integer plus proper fraction

Equivalent

Two fractions representing same proportions

Adding/Subtracting

Must have same denominator

Add numerator and place over denominator

Multiplying

Mulitply numerator, then multiply denominator

or Cancel down first, then

Dividing

Multiply by reciprocal

Can be written in expanded fraction form

Rounding