In this lesson, students learn about evaluating, writing, and interpreting expressions, focusing on the order of operations. The teacher explains a problem involving Maria and her friend buying snacks, demonstrating different methods to solve it. The lesson emphasizes the importance of grouping symbols and the order of operations, providing practice problems and reviewing key vocabulary.

What is the main focus of lesson 30 session one?

• Evaluating, writing, and interpreting expressions

• Solving algebraic equations

• Understanding geometric shapes

• Learning about fractions

What is the cost of a drink at the snack stand?

• $10

• $3

• $5

• $8

How much does Maria pay in total for the snacks?

• $13

• $18

• $30

• $26

What is the first step in solving a multi-step problem?

• Add all numbers together

• Subtract the smallest number

• Decide the order of operations

• Multiply all numbers

What are the most commonly used grouping symbols in fifth grade?

• All of the above

• Braces

• Brackets

• Parentheses

What is the first rule in the order of operations?

• Solve the equation directly

• Perform operations inside grouping symbols

• Add and subtract from left to right

• Multiply and divide from left to right

In the expression 2 times 5 plus 8, what operation is performed first?

• Division

• Subtraction

• Multiplication

• Addition

How does the presence of parentheses affect an expression?

• It makes no difference

• It changes the order of operations

• It simplifies the expression

• It adds more steps

What does it mean to evaluate an expression?

• To ignore it

• To multiply it

• To write it down

• To find its value