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Interactive video lesson plan for: Working With Expressions and Equations (Pre-algebra/Grade 7 math)

Activity overview:

In this video, we study how to write an equation from its verbal description, such as:
"20 less than some number is x"
"The quotient of 16 and a number x equals 4/5".

Then we look at several situations that are used in algebra word problems, and figure out which of the given expressions matches the statements in the situation.

For example, if an item with price p is offered at half price, and Jane buys 3, which expression gives us the total cost Jane pays?

Another example is that Sam buys 4 books with an original price of p, but they are discounted by $1. We need to figure out which mathematical expression gives us the total price of those books.

This is the 2nd part of a lesson on expressions and equations. You can find the first part at https://www.youtube.com/watch?v=J8dzNIKOQYc

Tengo una versión español de este video que se halla en https://www.youtube.com/watch?v=GjBgV9rQTpk

Learn more pre-algebra with Math Mammoth Grade 7 Curriculum at http://www.mathmammoth.com/complete/grade_7.php - available as an instant download and as printed copies. Check out the free samples also!

Tagged under: Equation,Expression,Algebra (Field Of Study),pre-algebra,grade 7,math

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