## Number: Structure and Properties Terms

**Average:**The total of all scores or items ÷ by how many scores or items there were.

**Decrease:**To get smaller in size or number.

**Denominator:**The bottom number of a fraction. The number below the line in a fraction.

**Equation:**A mathematical statement that contains an = sign to show that two expressions are equal.

**Factor:**A whole number which divides exactly into another number (with no remainder).

**Finite:**Countable. Is not infinite. Does not go on forever.

**Formula:**A general equation or rule.

**Function:**A relation between two sets called the domain and range in which each member of the domain is related to precisely one member of the range.

**Highest common factor (HCF):**The largest number that divides evenly into two or more numbers.

**Improper fraction:**A fraction whose numerator (number on top line) is greater than its denominator

(number on bottom line).

**Inequality:**A mathematical sentence that compares two unequal expressions using one of these symbols: <, >, ≤, ≥ and ≠

**Least common multiple (LCM):**The smallest number that is a common multiple of two or more numbers.

**Mixed number:**A number written as a whole number with a fraction.

**Multiple:**The product of a whole number and any other whole number.

**Natural number:**A whole number, from 1 to infinity. These numbers are used for counting.

**Ratio:**A comparison of two amounts, measures or numbers.

**Recurring decimal:**A decimal which has repeating digits or a repeating pattern of digits. Example: 1/3 = 0.3333....

**Square Root:**A number that when multiplied by itself gives the original number.

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