9-6 6th grade math

1
9-66th grade math

• Solving Percent Problems
• Using Equations

2
Objective

• To write and solve percent equations
• Why? To know to correctly write equations to
  solve word problems posed to you in any math.
  How to be a good translator.

3
California State Standards

• AF 1.1 Write and solve one-step linear
  equations in one variable.
• NS 1.0 Solve problems involving
  percentages
• MR 2.6 Express the solution clearly and
  logically by using the appropriate mathematical
  notation and terms and clear language support
  solutions with evidence in both verbal and
  symbolic work.

4
Vocabulary

• What number
• x or n or whatever variable youd like to use
• is
• equals ()
• What percent
• x
• of
• x (or sometimes )

5
How to Solve Percent Problems Using Equations

• What number is 25 of 62?
• x 25 x 62
• x .25 x 62
• x 15.5
• B) 15 is what percent of 75?
• 15 x x 75
• x 15 75
• x .2
• x 20
• C) 35 of what number is 70?
• 35 x n 70
• .35n 70
• n 70 .35
• n 200

• 1) Read the problem.
• 2) Translate the question using your math-enese
  or math-ish.
• 3) Solve.

6
Try It!

• What number is 40 of 88?
• x 40 x 88
• x 35.2
• 2) What percent of 90 is 27?
• x x 90 27
• x 30
• 3) What is 120 of 360?
• x 120 x 360
• x 432
• 16 is what percent of 40?
• 16 x x 40
• x 40

• Write an equation and solve.
• What number is 40 of 88?
• What percent of 90 is 27?
• What is 120 of 360?
• 16 is what percent of 40?

7
Try One More!

• There are 300 novels. 180 have been sold so far.
  What percent of the novels have been sold?
• Write an equation and solve.

• 5) x x 300 180
• x 180 300
• x .6
• x 60

8
Objective Review

• To write and solve percent equations

• Why? You now know how to correctly write
  equations to solve word problems posed to you in
  any math.
• You are now a good translator.
• Equations can be used to represent and solve
  percent problems.

9
Independent Practice

• Complete problems 6-15
• Copy original problem first.
• Show all work!

• If time, complete Mixed Review 18-23
• If still more time, work on Accelerated Math.