Write and evaluate expressions for mathematical and contextual situations.
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This lesson approaches 7.EE.1 while engaging students in 7.NS.3.
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Given the expression: $${(a^2-b)-(2ab)}$$
Is the expression greater when $${a=-1}$$, $${b=1}$$ or when $${a=1}$$, $${b=-1}$$?
Write an expression for each sequence of operations.
Expression 1: Add $$3$$ to $$x$$, subtract the result from $$1$$, then double what you have.
Expression 2: Add $$3$$ to $$x$$, double what you have, then subtract $$1$$ from the result.
Evaluate each expression for $$x=2$$.
Writing Expressions, accessed on Oct. 6, 2017, 2:32 p.m., is licensed by Illustrative Mathematics under either the CC BY 4.0 or CC BY-NC-SA 4.0. For further information, contact Illustrative Mathematics.
Modified by The Match Foundation, Inc.Three friends went to the movies. Each purchased a medium-sized popcorn for $$p$$ dollars and a small soft drink for $$d$$ dollars. The friends paid together with two twenty-dollar bills.
Grade 7 Mathematics > Module 2 > Topic C > Lesson 18 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..
Modified by The Match Foundation, Inc.?
The following resources include problems and activities aligned to the objective of the lesson that can be used to create your own problem set.
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Bradley and Louie are roommates at college. At the beginning of the semester, they each paid a security deposit of A dollars. When they move out, their landlord will deduct from this deposit any expenses, B, for any damages and refund the remaining amount. Bradley and Louie will share the expenses equally.
Grade 7 Mathematics > Module 2 > Topic C > Lesson 18 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..
Evaluative $${2x^3-4\left ( x+4\frac{1}{2} \right )}$$ for $${x=-2}$$.
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