7.5.3 Writing Proportions.

Slides:

Advertisements

Similar presentations

Application of Proportions

Advertisements

Math 025 Unit 5 Section 6.4. Objective: To simplify a complex fraction A complex fraction is a fraction whose numerator or denominator contains one or.

MENTAL MATH General Review = 60 – 10 = =

Math Journal 9-29

Writing and Solving Proportions. Proportions Proportion is an equation stating that two ratios are equivalent. Proportional are two quantities that form.

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.

Modeling Multiplication of Fractions

1.8 INTRODUCTION TO EQUATIONS I can solve equations using tables and mental math.

MFM1P Learning Goals: I can solve equations when there are variables on both sides. Lesson 3: Solving Equations Part 3.

Equivalent Fractions and Decimals

4.4 & 4.5 Notes Remember: Identity Matrices: If the product of two matrices equal the identity matrix then they are inverses.

Multiplying Fractions A Visual Lesson. When you multiply two numbers, do they always get larger? Are you sure?

Fractions, Decimals, and Percents. Percents as Decimals To write a percent as a decimal, divide by 100 and remove the percent symbol. Example 1: 63% 63.

Multiplying Fractions and Mixed Numbers

Proportions Objectives: 1) solve equations with variables in numerators 2) Solve equations with variables in denominators.

WARM UP ANNOUNCEMENTS  Test  Homework NOT from textbook!

7.8 Partial Fractions. If we wanted to add something like this: We would need to find a common denominator! Now, we want to REVERSE the process! Go from.

Ch 1.4 – Equations & Inequalities

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.

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

Divide Fractions Lesson 2.3. Using Mental Math ÷How many groups of are in ? 1414 ÷ 3 How many groups of are in 3? 3434 ÷ 3 What are the 3 equal groups.

Today’s Plan: -Compare and order decimals -Human Number Line -Compare and order fractions 11/17/10 Compare and Order Rational Numbers Learning Target:

Math IA Warm Up: 1.Solve. How did you clear the fraction? x = 9x = 27 3Multiply by the denominator 2. Solve. What process do you use to clear fractions.

Get papers sit down get out homework &quietly work on bellringer Solve Using ladder to find GCF LCM and simplify fraction 72 and 56.

  A ratio is a way to compare two quantities that are measured in the same units by using division  45 : 100 Ratio.

Wednesday’s Schedule Frenzy! Frenzy!

Part of a set or part of a whole. 3 4 =Numerator the number of parts = Denominator the number that equals the whole.

Math Homework Study Links pg. 199 & get test folder signed Individuals: Homework out; ready to check. Thursday, April 9 th.

Solving a Proportion by “Cross” Multiplying

Finding Proportions using Cross Multiplication

Singapore Math Adding Fractions

PROPORTIONS Write ratios Use properties of proportions

7.5.4 Solving Proportions & Word Problems

Fractions: Adding and Subtracting Like Denominators

Lesson 85 Warm Up Pg. 441.

Ratio – comparing same things

Lesson 5-1: Using Proportions

Lesson 5-1 Using Proportions.

Section 5.3A Solving Proportions Section 5.3A Solving Proportions

Math Flash Fractions I Shirley Sides

Bell Work: 11/6/14 Simplify the following numeric fractions

Rates (unit Rate) Ratio Solving

Day 1 Objective: I can change fractions to decimals.

Math 3-1: Warm-up.

Using Proportions.

Rational Equations.

Modeling Multiplication of Fractions

Ratios Module 1: Lesson 8.

Fractions: Adding and Subtracting Like Denominators

Math 801A: Mathematical Operations – Subtracting Fractions

Lesson 5-1 Using Proportions.

Limits – Graphically and Numerically

Comparing fractions.

Lesson 5-1: Using Proportions

Solving Division Equations

Notes Over 1.3 It’s time to stop “daydreaming”

Bell Work: Compare each fraction using <, =, or >

Finding the Least Common Denominator to Add/Subtract Fractions

Which triangles are similar?

Understanding Proportions

Finding Proportions using Cross Multiplication

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

Equivalent Forms of Rational Numbers

Ratio A ratio is a comparison of two numbers such as a : b. Ratio:

Using Cross Products Chapter 3.

Presentation transcript:

7.5.3 Writing Proportions

Tables, Rows, and Columns Use a table to help you in writing proportions You can use the columns… 2 boxes = 3 boxes (numerators have the same units) $9.00 x dollars (denominators have the same units) You can use the rows… 2 boxes = $9.00 (the units are the same on 3 boxes x dollars each side of the proportion) Last Weekend This Weekend Popcorn Boxes 2 3 Total Cost $9.00 x dollars

Batting Average batting average = at bats (A) hits (H) . batting average = at bats (A) A player whose batting average is .250 is has a 250 batting average. 20 hits = .250 batting average = 250 hits . 80 at bats 1000 at bats

How many hits? Determine the hits needed for each batting average below. 50 times at bat; batting average is .200 84 times at bat; batting average is .250 80 times at bat; batting average is .350 1 time at bat; batting average is 1.000

Mental Math Step 1: Think about the relationship between the two numbers on each side of the equal sign. Example: 3 . = x . 2 8 2 · ? = 8 2 · 4 = 8 Step 2: Apply that relationship to the other number to solve for x. 3 . = x . 2 8 3 · 4 = 12 x = 12

Solving Proportions Using Mental Math 5/8 = 20/d 7/z = 14/10 21/24 = x/8

Homework Pg. 182 #1, 4*, 5*, 6*, 7*, 8*, 10*, 12, 17, 19, 20, 21 *note: you don’t need to solve these; just write the proportion (the two fractions with the equal sign in between them).