Using Proportions Lesson 4-1. Ratio: The comparison of two numbers (written in Algebra as a fraction) Proportion: When two ratios are equal to each other.

Slides:

Advertisements

Similar presentations

Transparency 2 Click the mouse button or press the Space Bar to display the answers.

Advertisements

4-1 Ratios & Proportions.

Proportions  A proportion is an equation with a ratio on each side. It is a statement that two ratios are equal.  3 = 6 is an example of a proportion.

8-2 6th grade math Proportions.

2.5 Solving Proportions Write and use ratios, rates, and unit rates. Write and solve proportions.

Using Cross Products Lesson 6-4. Cross Products When you have a proportion (two equal ratios), then you have equivalent cross products. Find the cross.

+ Cross Multiplication Objective: We will learn to use cross multiplication to solve a proportion. We will use cross multiplication to check whether two.

Finding a Percent of a Number Lesson 6-7. Using a Proportion Set up a proportion that uses the percent over 100. Cross multiply to write an equation.

Solving Proportions, Using Exponents. Proportions Many chemistry problems deal with changing one variable and measuring the effect on another variable.

7.1 Ratio and Proportion Textbook page 357.

Algebra 1 Notes 3.6 Warm Up Vocabulary 3.6 Ratio: Comparison of two numbers by division. Can be expressed 3 ways. Proportion: Equation stating.

PERCENT PROPORTIONS Using Proportions 4-1. Vocabulary Review Ratio: The comparison of two numbers (written in Algebra as a fraction) Proportion: When.

Solving Percent Problems Section 6.5. Objectives Solve percent problems using the formula Solve percent problems using a proportion.

1 Math Solving Proportions. 2 Vocabulary ► Proportion—an equation that shows that two ratios are equivalent. ► Cross Product—the product of the numerator.

Objective Students will solve proportions Chapter 8, lesson 2 (8-2).

Percents, Fractions, and Decimals Finding a Percent of a Number Lessons 6.6 & 6.7.

Percents and Fractions. Vocabulary A percent is a ratio that compares a number to 100. It means “per 100.” 49 out of 100 is 49%.

Organize Binders -Move ch. 3 notes to “old notes” -Move review sheet to “review” -Move Quiz to “quiz” -Throw away old homework.

Ratio, Rate, Proportion, and Percent. Ratio  Comparison of two numbers by division  Can be written three different ways 4 to 9 4 :

2.7 solving proportions Objective: 1. Solve problems using proportions.

6.1.1 RATIOS, PROPORTIONS, AND THE GEOMETRIC MEAN Chapter 6: Similarity.

Rates, Ratios, Proportions & Unit Rate By Colin C.

Solving Proportions. 2 ways to solve proportions 1. Equivalent fractions (Old) Cross Products (New)

1. What Are You Learning? I CAN solve proportions. 2.

Solving Percent Problems Using Proportions

Chapter 9: Lesson 4: Solving Percent Problems with Proportions

Chapter 10: Lesson 4: Solving Percent Problems with Proportions

Friday, December 3 Objective: SWBAT find ratios and rates solve proportions Homework: Practice 4-1 Bell Work (write in simplest form)

EQUIVALENT FRACTIONS. Math Vocabulary Equivalent fraction(s): Fractions that are EQUAL to each other, even though they look different.

PROPORTIONS 6-2. VOCABULARY Proportion – equality of two ratios Cross Products – the results when you cross multiply.

Pre-Algebra 7-1 Ratios and Proportions Warm Up Write each fraction in lowest terms. Pre-Algebra 7-1 Ratios and Proportions

Solving a Proportion by “Cross” Multiplying

Finding a Percent of a Number

Aim: what you’ll learn Express percents as fractions and vice versa Express percents as decimal and vice versa. Do Now:

Finding Proportions using Cross Multiplication

Using Proportions – Less 6.6

A proportion is an equation that states two ratios are equal

Fractions in Algebraic Equations

Lesson 85 Warm Up Pg. 441.

SOLVING EQUATIONS, INEQUALITIES, AND ALGEBRAIC PROPORTIONS

6.3 Solving Proportions Using Cross Products

Algebra Bell-work 9/1/17 1.) 3x – 3 – x = 2x – 3 2.) 3x – 7 = 3x + 5

Ratios and Proportions

Proportions and Percent Equations

Direct Variation 4-5 Warm Up Lesson Presentation Lesson Quiz

2-7 Solving Proportions.

Finding a Percent of a Number

Lesson 5.2 Proportions Students will be able use cross multiply to determine if the two ratios are equivalent.

Section 5.3A Solving Proportions Section 5.3A Solving Proportions

6.2 Proportions.

Understanding Proportions

Objective: Understand what proportions are, setting the up and solving

Finding a Percent of a Number

Finding a Percent of a Number

Scale factors and similarity

7.1 Proportions Ratio: A comparison of two quantities using division.

Write a proportion that compares hours of work to pay.

Lesson 6 Ratio’s and Proportions

Which triangles are similar?

Understanding Proportions

Finding Proportions using Cross Multiplication

Objective: Learn to use a table to find equivalent ratios and rates.

Ch. 2 Vocabulary 12.)Proportion 13.) Cross products (of proportion)

Identifying and Writing Proportions 4-2

EXAMPLE 4 Solve proportions Solve the proportion. ALGEBRA a x 16

Ratios Unit 1 Lesson 1 Math 6.

Using Cross Products Chapter 3.

Presentation transcript:

Using Proportions Lesson 4-1

Ratio: The comparison of two numbers (written in Algebra as a fraction) Proportion: When two ratios are equal to each other Cross Product(s): When we cross multiply/compare diagonally, the special relationship between two ratios in a proportion Math Vocabulary

To compare a proportion: 3 = We use cross products to find if proportions are equal… 3 16 = 4 12 Understanding Proportions

Solving Proportions To solve a proportion: 1)Cross multiply 2)Cross multiply 3)Divide to Solve t = 2 9 3

Solving Proportions w/ (-) When a negative ratio is present: _ 6 = 4 y 16 *take (-) with either # in only ONE cross product Solve: _ 21 = 7 12 y

Practice Justify whether or not the ratios are proportional: a) 3 = b) 1 = Solve the proportion: c) w = d) 10 = _ 5 m 7

p. 161 #1-5, Homework