19 entries

Maths words beginning with S

Sample: The group of people or items that you actually collect data from. A fair sample represents everyone you want to know about.
Savings: Money you put aside to use later instead of spending it now.
Scale: The numbers marked along an axis, with equal steps, used to read values from a graph.
Scale factor: The number that every length is multiplied by in an enlargement.
Sector: The part of a circle between two radii and an arc, like a pizza slice.
Sequence: A list of numbers in order that follows a rule.
Similar: The same shape but not always the same size. One is an enlargement of the other.
Simplest form: A fraction written so that the top and bottom share no factor except $1$ .
Skip counting: Counting forwards or backwards in equal jumps, such as $2$ s, $5$ s or $10$ s, saying only the numbers you land on.
Speed: How far something travels in a given time.
Square root: A number that, when multiplied by itself, gives the original number. Written with the symbol $\sqrt{\;}$ .
Square unit: A square with sides of one unit, used to measure area.
Standard deviation: A measure of how spread out data is around the mean: roughly the typical distance of a value from the mean.
Standard form: A way of writing very large or very small numbers as $a \times 10^n$ , where $1 \leq a < 10$ and $n$ is a whole number. Also called scientific notation.
Subject of a formula: The letter that stands alone on one side of a formula.
Substitution: Replacing the letters in an expression or formula with numbers and working out the result.
Surface area: The total area of all the faces or curved surfaces of a three-dimensional shape.
Survey: A way of collecting data by asking the same question to many people and recording the answers.
Symmetry: A shape has symmetry if a reflection, rotation or other transformation leaves it looking exactly the same.