6th Grade Math Textbook, Fundamentals

Solve.

1. 4.5 2.2.4  3 y 3. 0.4

4.0.5y1. 5y1. 8 5. 1. 4 6.n2.5n1. 5n 35

7.Discuss and Write Explain how you can use estimation

to check the solution of the equation 0.08.

Estimate, solve, and check to justify your answer.

y

0.556

x

0.2

w

0.6

n

 2

Lesson 4-13 for exercise sets. &KDSWHU 

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Remember:

Multiplication Property of Equality:

If ab, then acbc.

Think

(z)1 • z

You can also use the Division Property of Equality to solve

an equation containing the opposite of a variable.

Solve:(z) 3.2

1(z) 3.2

 Divide both sides by 1 to isolate z.

 Simplify.

z3.2

To solve a division equation, estimate the quotient. Then use

the Multiplication Property of Equality to solve the equation.

Solve for n: 18.75

Estimate.

 20 (1) 20(1) n 20

Solve:

(1.2) 18.75(1.2) Multiply both sides by 1.2 to isolate n.

n22.5

Check: 18.75

18.75 Substitute 22.5 for n, then simplify.

18.75 18.75Tr u e

The answer, 22.5, is close to the estimate of 20, so the answer is reasonable.

22.5

1. 2

n

1. 2

n

1. 2

n

 1

n

 1

n

1. 2

3.2

 1

3.2

 1

 1 z

 1

?





1

1

1

1

z

Check:(z) 3.2

(3.2) 3.2 Substitute 3.2 for z.

3.2 3.2 Tr u e

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