Math 7 Unit 1: Number Sense Vocabulary

Flashcards defining key mathematical terms, concepts, and rules from Math 7 Unit 1: Number Sense.

Integer

Whole numbers ($0, 1, 2, 3, \dots$) and their opposites.

Absolute Value

The distance a number is from zero on a number line.

Adding Negatives Rule

The operational rule to rewrite "$+(-)$" as subtraction.

Subtracting Negatives Rule

The operational rule to rewrite "$-(-)$" as addition.

Rational Number

A number that can be written as the ratio of two integers.

Simplest Form

A fraction that cannot be simplified any further.

Improper Fraction

A fraction in which the numerator is larger than the denominator.

Mixed Number

A number paired with a proper fraction.

Least Common Multiple (LCM)

The smallest multiple that two or more numbers have in common, used to find common denominators for adding and subtracting fractions with unlike bases.

Reciprocal

The inverted form of a fraction where the numerator and denominator switch places, used when dividing fractions.

Exponent

The power in an exponential expression indicating how many times the base number is multiplied by itself.

Perfect Square

The square of an integer.

Square Root

The opposite operation of squaring a number, finding the value that multiplies by itself to equal the given number.

Radical Sign

The symbol ($\sqrt{x}$) used to indicate the square root of a number $x$.

Scientific Notation

A compact way of writing very small or very large numbers using powers of $10$, written in the form $a \times 10^n$ where $1 \le a < 10$.