Evaluating Algebraic Expressions in 6th Grade Math

This video tutorial by Stan Lyle covers algebraic expressions, focusing on writing and evaluating them. It begins with an introduction to numerical and algebraic expressions, explaining the use of variables. The tutorial then demonstrates solving word problems by substituting variables, followed by examples of evaluating expressions. It also includes a section on calculating average speed using division. The video concludes with a call to practice the skills learned using worksheets available on the MasterMath website.

What is a numerical expression?

• An expression with only letters

• An expression with only numbers

• An expression with both numbers and letters

• An expression with symbols

Which letter is commonly used as a variable?

• Z

• M

• A

• X

How can variables be represented in algebraic expressions?

• Any letter or combination of letters

• Symbols only

• Words only

• Numbers only

What does a variable represent in an algebraic expression?

• A known number

• A specific operation

• An unknown number

• A constant value

How do you solve X + 3 = 5?

• X = 3

• X = 2

• X = 8

• X = 5

What is the value of X if 3X = 12?

• 12

• 9

• 4

• 3

If tickets cost $3 each, how much do 4 tickets cost?

• $15

• $3

• $7

• $12

How do you calculate the improvement in grades from 85 to 93?

• Divide 93 by 85

• Multiply 85 by 93

• Add 85 and 93

• Subtract 85 from 93

What is the average speed if you travel 250 miles in 5 hours?

• 45 miles per hour

• 50 miles per hour

• 60 miles per hour

• 55 miles per hour

What does 'per' indicate in expressions like miles per hour?

• Multiplication

• Addition

• Subtraction

• Division