Table of Contents

- 1 How do you evaluate an expression without parentheses?
- 2 How do you write an algebraic expression without parentheses?
- 3 How do you solve an expression with one variable?
- 4 How do I evaluate an expression?
- 5 How to differentiate between 3×8 and-3x 8 expressions?
- 6 Why do mathematicians use the Order of operations?

## How do you evaluate an expression without parentheses?

You want to simplify by writing an equivalent expression without parentheses. First, multiply the 3 by each of the terms inside the parentheses. Next, simplify each part of the expression and then subtract.

## How do you write an algebraic expression without parentheses?

**Which steps of Pemdas would you need to use to evaluate the following expression?**

The order of operations is a rule that tells the correct sequence of steps for evaluating a math expression. We can remember the order using PEMDAS: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

**What are the 4 order of operations?**

First, we solve any operations inside of parentheses or brackets. Second, we solve any exponents. Third, we solve all multiplication and division from left to right. Fourth, we solve all addition and subtraction from left to right.

### How do you solve an expression with one variable?

- Step 1: Simplify each side, if needed.
- Step 2: Use Add./Sub. Properties to move the variable term to one side and all other terms to the other side.
- Step 3: Use Mult./Div.
- Step 4: Check your answer.
- I find this is the quickest and easiest way to approach linear equations.
- Example 6: Solve for the variable.

### How do I evaluate an expression?

To evaluate an algebraic expression means to find the value of the expression when the variable is replaced by a given number. To evaluate an expression, we substitute the given number for the variable in the expression and then simplify the expression using the order of operations.

**Do you multiply before you add if no parentheses?**

Because 4 × 4 = 16 , and once there are no parentheses left, we proceed with multiplication before addition. This set of parentheses yields yet another answer. So, when parentheses are involved, the rules for order of operations are: Do operations in parentheses or grouping symbols.

**How to evaluate an expression with or without parentheses?**

Sal evaluates an expression with and without parentheses. Created by Sal Khan. This is the currently selected item. Posted 3 years ago. Direct link to Dagoberto’s post “why does the math seem easier in the videos than i…”

## How to differentiate between 3×8 and-3x 8 expressions?

I’m curious how you can differentiate between 3×8 and -3×8 because when I look at this problem, I would’ve automatically connected the negative sign with the 3 being that there wasn’t any parentheses. What is the proper way to go about this?

## Why do mathematicians use the Order of operations?

Many years ago, mathematicians developed a standard order of operations that tells you which calculations to make first in an expression with more than one operation. Without a standard procedure for making calculations, two people could get two different answers to the same problem. For example, 3 + 5 • 2 has only one correct answer.

**When to use parentheses to show multiplication and Division?**

Remember that parentheses can also be used to show multiplication. In the example that follows, the parentheses are not a grouping symbol; they are a multiplication symbol. In this case, since the problem only has multiplication and division, we compute from left to right. Be careful to determine what parentheses mean in any given problem.