Place value, Ordering Integers and decimals (Year 7)

Approximation:  The value that is not exact, but close enough to be used.

Integer: A number with no fractional part (no decimals).

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

Interval: what is between two values or points.

Median: The middle piece of data in an ordered set of data. 

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

Place holder: We use 0 (zero) as a place holder to show that there are none of a particular place in a number.

Place value: The value of a digit depending on its place in a number. 

Rounding: means making a number simpler but keeping its value close to what it was.

Significant figure: A digit that gives meaning to a number. The most significant digit is the first non-zero number.