Evaluating Expressions: Addition and Subtraction Techniques

The video tutorial introduces algebraic expressions, explaining their components and differences from equations. It covers how to read, write, and evaluate these expressions using examples. The tutorial emphasizes understanding keywords for writing expressions and demonstrates evaluating them by substituting values, following the order of operations.

What does an algebraic expression consist of?

• Variables and constants combined with arithmetic operations

• Only variables without any arithmetic operations

• Only constants and equal signs

• Variables and constants without arithmetic operations

How would you read the expression '3a'?

• Three times a

• Three plus a

• The sum of three and a

• Three divided by a

What does the expression 'y minus 10' suggest?

• The sum of y and 10

• The product of y and 10

• Ten times a number y

• Ten less than a number y

How is 'the product of 4 and a number' written in algebraic form?

• 4x

• 4 + x

• 4 / x

• 4 - x

What does 'the sum of twelve and a number' translate to in algebraic expression?

• 12x

• 12 / x

• 12 - x

• 12 + x

If 'a' is 7, what is the value of the expression '9 + a'?

• 7

• 16

• 2

• 9

How do you evaluate the expression '2b' if b = 5.5?

• 5.5

• 11

• 10

• 7.5

What result do you get when you divide 'c' by 3, if c = 9.3?

• 9.3

• 6.2

• 3.1

• 12.3

In the expression 'x + y - z', if x = 12.4, y = 8, and z = 3.6, what is the result?

• 18.8

• 17.8

• 16.8

• 15.8

What is the outcome of '3z + y - x' if z = 3.6, y = 8, and x = 12.4?

• 6.4

• 9.4

• 5.4

• 7.4