Exploring Numerical Expressions for 6th Grade

This video tutorial covers Chapter 6, Lesson 2 on numerical expressions. It explains how to find the value of expressions using the order of operations, often remembered by the mnemonic 'Please Excuse My Dear Aunt Sally' (PEMDAS). The tutorial provides detailed examples of solving expressions step-by-step, demonstrating the importance of following the correct order: parentheses, exponents, multiplication and division (from left to right), and addition and subtraction (from left to right). Additionally, it includes a practical example of calculating the total cost of items using expressions.

What is the first step in the order of operations?

• Add and subtract from left to right

• Multiply and divide from left to right

• Evaluate exponents

• Simplify expressions inside grouping symbols

Which mnemonic device helps remember the order of operations?

• Please Excuse My Dear Aunt Sally

• King Henry Died By Drinking Chocolate Milk

• My Very Educated Mother Just Served Us Noodles

• Every Good Boy Deserves Fudge

In the expression 4 + 3 * 5, which operation should be performed first?

• Multiplication

• Subtraction

• Addition

• Division

What is the value of the expression 2 * 5 + 10?

• 20

• 15

• 25

• 10

In the expression 3 + (4^2 + 5), what should be calculated first?

• 4 + 5

• 4^2

• 3 + 4

• 3 + 5

What is the result of 6^2?

• 18

• 24

• 36

• 12

How do you simplify the expression 8^2 - 2?

• Subtract 2 from 8

• Add 2 to 8

• Calculate 8^2 first

• Calculate 8 - 2 first

What is the value of 24 / (2^3 + 4)?

• 4

• 2

• 5

• 3

If you have 5 lotions at $5 each, 2 candles at $7 each, and 4 lip balms at $2 each, what is the total cost?

• $47

• $45

• $49

• $50

What is the final value of the expression 9 + 64 * 12 / 2 + 6?

• 384

• 393

• 409

• 399