Algebra I - Multiplication and Division

In this article, we will learn how to multiplication and division algebraic expressions:
 - Multiplication; multiplying positive numbers, in any order
- Multiplying by 1 and 0; discover what happens when you multiply by 1 and 0
- Division; dividing positive numbers, and ways to think about it
- Dividing by 0; an operation you just can't perform etc.
- Order of operations; is there more than one way to evaluate an expression?
- Distributive law; getting rid of parentheses when you add and multiply
- Multiplying negatives; what happens when you multiply negatives together?
- Dividing negatives; what happens when you divide negative numbers?
- Distributing negatives; distributing a negative flip the signs
- Brackets [] and Braces {}; what to do when you have too many parentheses!
- Finding the average; discover how to find the "average" of numbers

Product, multiplied by, of and times: are the same meaning and two symbols are * or ⋅ in computing.

Quotient, divided by, ratio and per: they different keyword, but have one meaning with symbol / or ÷in calculation.

Multiply a number by 1 get the same number back. Multiply a number by 0 always get result 0. Zero divided by any number give you zero. Any number divided by zero (0) is undefined.

perform addition and subtraction from left to right. Perform multiplication and division from left to right. Perform multiplication and division before addition and subtraction when they come together.

Evaluate what’s in parentheses first.

A negative number times a positive number result in a negative. A negative number times a negative number results in a positive. A positive number times a positive number result in a positive.

Dividing minus number by positive number or diving positive number by minus number, you can pull minus signs out of quotient.

Dividing minus number by minus number, minus signs cancel out. 

When you distribute a negative number, flip the sign; addition become subtraction, subtraction become addition. Nested parentheses, evaluate innermost parentheses and work your way out.

Outer parentheses are often written as brackets or braces.

To find average number first, add up all the numbers and then divide the sum by how many numbers you are averaging.

Algebra I - Multiplication and Division - Part 01:  

Algebra I - Multiplication and Division - Part 02: 

Algebra I - Multiplication and Division - Part 03: