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Envision Math 2.0: Grade 7, Volume 1

EM

Envision Math 2.0: Grade 7, Volume 1 View details

1. Write and Evaluate Algebraic Expressions

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Exercise 14 Page 193

Substitute - 12 for w in the expression.

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Practice makes perfect

To evaluate the given expression for w=- 12, we should substitute - 12 for w in the given expression and then simplify.

34+4/9w

w= -1/2

34+4/9( -1/2)

MoveNegFracToNum

Put minus sign in numerator

34+4/9(-1/2)

Multiply fractions

34+4* (-1)/9* 2

Multiply

34+-4/18

a/b=.a /2./.b /2.

34+-4÷ 2/18÷ 2

Simplify quotient

34+-2/9

MoveNegNumToFrac

Put minus sign in front of fraction

34-2/9

Subtract term

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Subchapter links

Do You Understand? p.192

Do You Know How? p.192

Practice & Problem Solving p.193-194

Assessment Practice p.194