Question

create a maths dictionary.for grade 8 . please help me

Answer 1

Order of Operations

An agreed upon set of rules used to evaluate expressions. (PEMDAS)

Factor

A number that is multiplied [OR] If A × B =C,then A and B are factors of C.

Multiple

If A × B =C,then C is a multiple of both A and B.

Prime number

A counting number greater than 1 with exactly two factors, 1 and itself.

Fundamental Theorem of Arithmetic

Any composite number can be expressed as a unique product of primes.

Prime factorization

A number expressed as the product of its prime factors.

Greatest common factor (GCF)

The largest natural number that is a factor of two given numbers.

Relatively prime numbers

Two natural numbers for which the only common factor is 1.

Least common multiple (LCM)

The smallest counting number that is a multiple of two numbers.

Power

A^b read "A to the B power," and means multiply B factors of A.

Base (of a power)

The number used as a factor in a power

Radicand

The number for which the root is being found OR the number under the radical

Exponent

The number in a power that indicates how many factors to multiply

Perfect square

A number for which the square root is rational

Exponent of 1

Any number to the first power is that number

Product of powers property

to multiply powers with the same base, add their exponents

Power of powers property

to raise a power to a power, multiply the exponents

quotient of powers property

to divide powers with he same base, subtract their exponents

Zero exponent

Any nonzero number to the zero power is one

Negative exponent

look on computer

Scientific notation

a number between 1 and 10 multiplied by and integer power of 10

commutative property +

the order of the addends does not affect the sum OR A+B=B+A

Commutative property x

The order of the factors does not affect the product OR AxB=BxA

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Answer 2

Absolute Value:

A number’s distance from zero.For any x, is defined as follows: |x| =  −x, if x < 0; x, if x ≥ 0.

Acute Angle: An angle whose measure is greater than 0 and less than 90 degrees.

Acute Triangle: A triangle in which all three angles are acute angles.

Algebraic Expression: An expression that includes one or more variables and may also include symbols indicating an operation or a relationship.

Area Model: A mathematical model based on the area of a rectangle, used to represent multiplication or to represent fractional parts of a whole.

Axis of Symmetry: The vertical line x = − b/(2a) for the parabola given by f(x) = ax² + bx + c or the vertical line x =  h when written f(x) = a(x − h)² + k.
Base:

For any number x raised to the nth power, written as x^n, x is called the base of the expression.In geometry any side of a triangle may be called the base.

Cartesian Plane: See: Coordinate Plane

Coefficient: In the product of a constant and a variable the constant is the numerical coefficient of the variable and is frequently referred to simply as the coefficient.

Common Factor: A factor that appears in two or more terms.

Compound Interest: Interest paid on previous interest which was added to the principal.

Consistent system: See: System of Equations

Convex Polygon: A plane, closed, figure formed by three or more line segments intersecting only at end points and each interior angle being less than 180 degrees.

Coordinate(s): A number assigned to each point on the number line which shows its position or location on the line. In a coordinate plane the ordered pair, (x, y), assigned to each point of the plane showing its position in relation to the x-axis and y-axis.

Coordinate Plane: A plane that consists of a horizontal and vertical number line, intersecting at right angles at their origins. The number lines, called axes, divide the plane into four quadrants. The quadrants are numbered I, II, III, and IV beginning in the upper right quadrant and moving counterclockwise.