Level 4
Level 6

#### 7 words 0 ignored

Ready to learn
Ready to review

## Ignore words

Check the boxes below to ignore/unignore words, then click save at the bottom. Ignored words will never appear in any learning session.

**Ignore?**

Natural numbers

the numbers used for counting and ordering

Integer

The set of whole numbers and their opposites.

fraction

a part of a whole

decimal

a number with one or more digits to the right of the decimal point

Negative number

a number less than zero

Integer factorization

the decomposition of a composite number into a product of smaller integers

Variable

an alphabetic character representing a number, called the value, which is either arbitrary or not fully specified or unknown. It is usually a letter like x or y.