Grade 6 Math: Four Powerful Ideas

Vocabulary practice flashcards covering fundamental Grade 6 mathematics concepts: square roots, fractions, geometry, and basic algebra.

Square Root

A mathematical operation that asks: What number times itself gives this number?

Numerator

The top number in a fraction that indicates the number of shaded or counted equal parts.

Denominator

The bottom number in a fraction that indicates the total number of all equal parts.

Equivalent Fractions

Fractions that represent the same amount using different names, such as $\frac{1}{2} = \frac{2}{4} = \frac{4}{8}$.

Benchmarks

Reference numbers, specifically $0$, $\frac{1}{2}$, and $1$, used to compare fractions.

Like Denominators

Fractions with same-sized pieces, where you keep the denominator and combine the numerators to add or subtract.

Geometry

The area of mathematics that uses precise words for shapes, sides, corners, and space to describe what you can see.

Square

A four-sided shape with $4$ equal sides and $4$ right angles.

Rectangle

A four-sided shape with opposite sides equal and $4$ right angles.

Triangle

A closed geometric shape containing $3$ sides and $3$ angles.

Perimeter

The distance around the outside of a shape, calculated for a rectangle using the formula $P = 2l + 2w$.

Area

The space inside a shape, calculated for a rectangle using the formula $A = l \times w$.

Acute Angle

An angle that measures less than $90^\circ$.

Right Angle

An angle that measures exactly $90^\circ$.

Obtuse Angle

An angle that measures more than $90^\circ$ and less than $180^\circ$.

Straight Angle

An angle that measures exactly $180^\circ$.

Letter for the Unknown

A symbol or letter used when a number is missing to give it a place to stand.

Expression

A mathematical phrase or calculation containing numbers, operations, and an unknown, such as $n + 5$ or $3x$.

Equation

A balanced statement with an unknown showing that both sides have the same value, such as $x + 7 = 19$.

Inverse Operations

Opposite mathematical operations used to balance and solve an equation, such as subtracting or dividing on both sides.