Unit 2 - Multiplying and Dividing Rational Numbers

Reciprocal

"FLIP" the numerator and denominator

Improper Fraction

A fraction where the numerator is greater than the denominator. In other words, it is top-heavy.

Number Line

A line with numbers placed in their correct position.

Rational Number

A number that can be made by dividing two integers. Examples: • 1/2 is a rational number (1 divided by 2, or the ratio of 1 to 2) • 0.75 is a rational number (3/4) • 1 is a rational number (1/1) • 2 is a rational number (2/1) • 2.3 is a rational number (23/10) • −6.6 is a rational number (−66/10)

Integers

A number with no fractional part. Includes: • the counting numbers {1, 2, 3, ...}, • zero {0}, • the negative of the counting numbers {-1, -2, -3, ...}

Mixed Number

A whole number and a fraction combined into one "mixed" number. Also known as a Mixed Fraction

Quotient

The answer to a division equation.

Product

The answer to a multiplication equation.

Difference

The answer to a subtraction equation.

Sum

The answer to an addition equation.

Inverse Operation

The operation that reverses the effect of another operation. Example: Multiplication and division are inverse operations. Subtraction and addition are inverse operations.

Coordinate Grid

The plane containing the "x" axis and "y" axis. There are four quadrants (sections)

Opposites

Two integers are opposites if they are each the same distance away from zero, but on opposite sides of the number line.

Decimals

a number that uses a decimal point followed by digits that show a value smaller than one.

Positive Numbers

Numbers that are greater than zero.

Negative Number

Numbers that are less than zero.