Basic Algebra/Introduction to Basic Algebra Ideas/Chapter Review
Contents
Lesson 1. Simple Operations[edit]
An operation is a thing you do to numbers. You use signs like: +, –, × , or ÷ for operations. The Equals Sign is not an operation.
 Adding
 Adding is a way to put two numbers together.
 1 + 2 = 3
 Subtracting
 Subtracting is a way of taking a number out from another number.
 2 – 1 = 1
 Multiply
 Multiplying is a way of adding a number many times
 3 × 2 = 6
 Dividing
 Dividing is a way of subtracting a number many times.
 6 ÷ 2 = 3
 Example Problems
 2 + 1 = 3
 8 + 2 = 10
 8 – 4 = 4
 5 – 2 = 3
 6 × 2 = 12
 2 × 3 = 6
 12 ÷ 6 = 2
 4 ÷ 2 = 2
Lesson 2. Exponents and Powers[edit]
Exponent is the number on the top that shows.
Base is the number to be multiplied by itself.
 Example Problems
 6^{2} = 36
 2^{3} = 8
 4^{2} = 16
 5^{3} = 125
 2^{4} = 16
Lesson 3. Order of Operations[edit]
Math problems are done in this order from top to bottom:
 Parenthesis ( )
 Exponent ^
 Multiply ×, Divide ÷ (Left to Right)
 Add +, Subtract – (Left to Right)
 Example Problem


Lesson 4. Working With Negative Numbers[edit]
A positive number is a number more than zero.
A negative number is a number less than zero.
 Example Problems
 6 + (–3) = 3
 3 + (–9) = –6
 –4 × 4 = 16
 4 × (–9) = 36
 –2 × (–4) = 8
Lesson 5. Solving Equations Using Properties of Mathematics[edit]
It is very important to show math in the simplest way. For example, 5/10 is the same as 1/2, but 1/2 is better because it is easier to understand. The simplest answer is usually the best.
 Example Problems
 Find when


