## Answers

It can be addition or subtraction sign or it can be a division or multiplication sign as well, but order of operations would have to be **PEMDAS** i.e. **Parentheses** , **Exponents** , **Multiplication** and **Division** , and **Addition** and **Subtraction** .

No. There is a commutative and associative property for both multiplication and addition.

#### Explanation:

That means you can “expand” parenthetical statements by an external operation. In your examples,

Similarly, with addition

In order to expand by using the distributive law there has to be an addition or subtraction sign in the bracket.

#### Explanation:

If I understand you to mean the 'distributive law' for expanding, then you will only 'expand' the bracket if there is an addition or subtraction sign in the bracket.

In

In

Removing the bracket in each case gives the following:

The reason for the expanding is that

While with

With the

Remember that there is a multiplication sign between the

I hope this helps?