Combining Like Terms in 7th Grade Math

This video tutorial focuses on combining like terms and writing equivalent expressions. It highlights common mistakes such as misinterpreting terms and incorrect simplification. The lesson uses analogies, like a salamander, to clarify concepts and emphasizes the importance of the order of operations. Strategies to avoid errors are discussed, and the lesson concludes with a reflection on the learning goals.

What is the correct simplification of 6x - x?

• 1x

• 6

• 5x

• 7x

Why is 7 - 2x not equal to 5x?

• They represent numbers.

• They are not like terms.

• They are like terms.

• They are both constants.

What does the video use to explain the concept of like terms?

• Numbers

• Variables

• Apples

• Salamanders

What is the correct approach to simplify 7 - 4(x + 2)?

• Subtract first

• Distribute first

• Add first

• Multiply first

What is the correct simplification of 7 - 4(x + 2) using the distributive property?

• 3x - 1

• 7 - 4x - 8

• 3x + 6

• 3(x + 2)

Why is it important to follow the order of operations in algebra?

• To use more variables

• To avoid using numbers

• To make it more complex

• To ensure correct simplification

What common error might occur when simplifying 5 - 2(3x - x)?

• None of the above

• Ignoring the negative sign

• Distributing incorrectly

• Adding instead of subtracting

How can writing subtraction as adding the opposite help?

• It complicates the expression

• It simplifies the expression

• It prevents common errors

• It has no effect

What is the simplified form of 5 - 2(3x - x)?

• 7 - 2x

• 5 - 4x

• 3x - 5

• 5 + 4x

What does the teacher emphasize is not a number?

• Variable

• Salamander

• Coefficient

• Expression