Math Investigation Yr7

11.06.25

Estimation

Guessing a value using reasonable assumptions and rounding numbers.

Mean

The average; add all numbers and divide by how many there are.

Median

The middle number when data is in order.

Mode

The number that appears most often in a set.

Range

The difference between the highest and lowest values in a data set.

Perimeter

The total length around a shape.

Area

The amount of space inside a 2D shape.

Volume

The amount of space inside a 3D object.

Square number

A number made by multiplying a number by itself.

Prime number

A number with exactly two factors: 1 and itself.

Factor

A number that divides evenly into another number.

Multiple

The result of multiplying a number by an integer.

Order of operations

The correct order to solve math problems (BIDMAS/BODMAS).

Equivalent fractions

Fractions that look different but have the same value.

Simplify a fraction

To reduce a fraction to its lowest terms.

Improper fraction

A fraction where the numerator is larger than the denominator.

Mixed number

A whole number and a fraction combined.

Percent

A part out of 100.

Decimal

A number with a decimal point.

Ratio

A comparison of two quantities.

Scale factor

The number used to increase or decrease a shape's size.

Algebraic expression

A math sentence with letters and numbers (e.g. 2x + 5).

Like terms

Terms with the same variables raised to the same power.

Collecting like terms

Combining similar algebraic terms.

Substitution

Replacing letters in algebra with numbers.

Variable

A symbol (usually a letter) that represents a number.

Equation

A math sentence that shows two things are equal.

Trial and error

A method where you test different values to solve a problem.

Table of values

A chart showing input and output pairs, often for an equation.

Justify your answer

Give clear reasons and explain your thinking or method.