Puzzle

4. a rule that tells the correct sequence of steps for evaluating a math expression.
6. a result obtained by dividing one quantity by another.
7. a combination of terms by the operations such as addition, subtraction, multiplication,
8. a mathematical statement involving only numbers and one or more operation symbols.
9. means to divide something or give a share or part of something.
10. the system in which the position of a digit in a number determines its value.
12. a word or phrase used to describe a thing or to express a concept, especially in a particular kind of language or branch of study.
13. the action of separating something into parts or the process of being separated.

1. not consistent or having a fixed pattern; liable to change.
2. the process or skill of multiplying.
3. an article or substance that is manufactured or refined for sale.
5. a math rule that says that the way in which factors are grouped in a multiplication problem does not change the product.
11. states that the numbers on which we operate can be moved or swapped from their position without making any difference to the answer.