31 terms

Equivalent Fractions

different fractions that name the same amount

Standard Ruler

An instrument that measures English lengths (inches, feet, and yards). See English ruler.

Metric Ruler

An instrument to measure metric lengths. Units of measure include millimeters, centimeters, and meters.

Engineer's Scale

a decimal scale graduated in units of 1 inch divided into 10, 20, 30, 40, 50, and 60 parts.

Architect's Scale

Uses fractions of an inch to represent feet and inches.

Numerator

the top number in a fraction

Denominator

the bottom number in a fraction

Improper Fraction

A fraction whose numerator is greater than or equal to its denominator.

Percentage

a ratio that compares a number to 100

Circle

the set of all points in a plane that are the same distance from a given point called the center

Triangle

A polygon with three sides.

Square

(geometry) a plane rectangle with four equal sides and four right angles

Rectangle

A quadrilateral in which the opposite sides are parallel, all angles are 90 degrees

Angle

the space between two lines or planes that intersect

Vertex

The common endpoint of an angle

Degrees

a unit for measuring angles

Circumference

the length of the closed curve of a circle

Carry

transfer (a number, cipher, or remainder) to the next column or unit's place before or after, in addition or multiplication

Sum

a quantity obtained by addition

Whole Number

Any number that isn't a decimal or fraction.

Fractions

represents a part of a whole. We use two numbers, one over the other, to make a fraction

Decimals

Numbers to the left of the decimal point are whole numbers; numbers to the right of the decimal point are fractions with denominators of only 10, 100, 1,000, 10,000, etc.

Example: 0.6 = 6/10 = 3/5

Example: 0.6 = 6/10 = 3/5

Digits

the symbols used to write numbers: 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9

Place Value

The value of a digit based on its position within a number

Positive

greater than zero

Negative

less than zero

Difference

the answer to a subtraction problem

Borrow

To move numbers from one value column to another value column to perform subtraction problems.

Product

a quantity obtained by multiplication

Quotient

the answer to a division problem

Remainder

the part of the dividend that is left over when the dividend is not evenly divisible by the divisor