Bell Ringer (In Your Spirals)

Slides:



Advertisements
Similar presentations
Solving 2 Step Equations
Advertisements

Course 2 Solving Multiplication Equations. Objectives Review vocabulary Review vocabulary Review solving equations by adding or subtracting Review solving.
Intro to Algebra/Geometry Solving Equations by Adding or Subtracting.
ALGEBRA EQUATIONS ► Goals for solving equations – Isolate the variable, and use the inverse operations to undo the operation performed on the variable.
Solving 2 Step Equations.
ONE STEP EQUATIONS.
Foundations of Algebra
ALGEBRAIC EQUATIONS. EQUATIONS AND SOLUTIONS  A correct equation is like a balance scale.  In order to determine if a given value for a variable is.
Chapter 3: Equations and Inequations This chapter begins on page 126.
Warm Up  – Evaluate.  (0.29)
Section 3.4: Solving Equations with Variables on Both Sides Algebra 1 Ms. Mayer.
The Equation Game. Why is an equation like a balance scale? 3 2x - 1 =
Do Now 10/1/09 Copy HW in your planner. Copy HW in your planner. –Text page , #32-62 even Be ready to finish the Chapter 2 Test. Get your calculators.
Must show ALL steps and ALL work for credit Equations - Introduction.
3.1 Solving 2-step equations. 3.1 – Solving 2-step Equations Goals / “I can…”  Solve 2-step equations  Use deductive reasoning.
Solving One-step Equations Algebraically. The goal of solving equations: -To get one x alone on one side of the equation. The rule for solving equations:
Solving Two-Step Equations
Solving Two- Step Equations Lesson 2-2. Rules to Remember When solving an equation, the goal is to get the variable by itself. Addition and Subtraction.
Solve two-step equations. 3.4 Objective The student will be able to:
3/29/07Ms. Waters. 3/29/07Ms. Waters Objectives To apply the properties of equality To simplify expressions using addition, subtraction, multiplication.
Algebra 1 Chapter 2 Section : Solving One-Step Equations An equation is a mathematical statement that two expressions are equal. A solution of an.
One-Step Equations I can show that solving an equation leads to finding the value that makes the equation true.
Solving Two- Step Equations
Reviewing One Step Equations.
Rules to Remember When solving an equation, the goal is to get the variable by itself. Addition and Subtraction are inverse operations. (opposites) Multiplication.
1. solve equations with variables on both sides. 2. solve equations with either infinite solutions or no solution Objectives The student will be able to:
Solving One-Step Equations Unit 2, Lesson 3 Online Algebra 1
Solve one step equations. You can add the same amount to both sides of an equation and the statement will remain true = = 9 x = y +
Warm Up Solve. 1. x + 5 = 9 2. x – 34 = 72 = x – 39 x = 4 x = 106
Goal: I will solve linear equations in one variable. ❖ Linear equations in one variable with one solution, infinitely many solutions, or no solutions.
Problem Solving with Two-Step Equations Objective: Learn to use more than one inverse operation to solve an equation.
Solving two step Inequalities < < < > < > <
Solving Equations. An equation links an algebraic expression and a number, or two algebraic expressions with an equals sign. For example: x + 7 = 13 is.
Lesson 8.1. » A statement where two mathematical expressions are. » Think of an equation as a balance scale or teeter-totter. The left side must always.
ONE STEP EQUATIONS Students will use inverse operations to solve one-step equations. x + 4 = 12 m – 18 = - 3 3p = x = -72 m + 18 = 3.
Solving Algebraic Equations. Equality 3 = = = 7 For what value of x is: x + 4 = 7 true?
Solving Addition and Subtraction Equations An equation is a mathematical sentence that contains an equal sign.
Two-Step Equations Review 1-Step 2-Step Equations Practice Problems.
Before: September 21, During: Solving One- Step Inequalities Learning Target: I can solve one-step inequalities by using addition, subtraction,
Solving One and Two Step Equations What is a one – step equation? Examples: 1)3x = 21 2)a/5 = 10 3)5 + b = 12 4)x – 10 = 15 5)6t = 36.
Solving Two- Step Equations
Solving Equations A-REI.B.3:Solving equations with a variable on one side, using inverse operations.
Students will use inverse operations to solve one-step equations.
LESSON 1.11 SOLVING EQUATIONS
Students will use inverse operations to solve one-step equations.
Students will use inverse operations to solve one-step equations.
Solving EQUATIONS Lesson #2 created by: ms. Guarnieri
ONE STEP EQUATIONS.
 .
ONE STEP EQUATIONS.
Warm-Up 13 x 3 14 x 4 12 x 11 9 x 13.
Solving 1-Step Integer Equations
Solving Two- Step Equations
Solving Equations with the Variable on Both Sides
Solving Equations by 2-1 Adding or Subtracting Warm Up
Students will use inverse operations to solve one-step equations.
Students will use inverse operations to solve one-step equations.
Solving Algebraic Equations
1.3 Solving Linear Equations
Solving Two- Step Equations
Solving Two- Step Equations
Students will use inverse operations to solve one-step equations.
Do Now Evaluate 9h + h if h = 2.1 Evaluate 2 (4 + g) 2 If g = 6.
10/3/11 In your notebook, answer completely the following:
ONE STEP EQUATIONS.
Solving Equations by 2-1 Adding or Subtracting Warm Up
Students will use inverse operations to solve one-step equations.
ONE STEP EQUATIONS.
Multi-Step equations with fractions and decimals
Presentation transcript:

Bell Ringer (In Your Spirals) Write down the steps to solve a division equation. Turn to your shoulder partner and review your steps. Make any revisions necessary. Copy and solve the equation 𝑥 4 = 7. Check your work with your partner. Each student must be ready to share the steps and solution when I call time.

7-3 A & B Two-Step Equations

Learning Goal 602 Reason about and solve one-variable equations and inequalities.   Learning Objectives: I understand that a variable (letter) represents an unknown number or set of numbers. I can use variables (letters) to represent numbers in expressions and inequalities. I can determine if a set of numbers makes an inequality or expression true. I can write and solve an equation or inequality in order to answer a question.

Today I am working with variables and inverse operations Today I am working with variables and inverse operations. So that I can evaluate two step equations. I’ll know I got it if I can evaluate problems like this… 2𝑥 −4=12

Solve a Two-Step Equation Let x = the number of packs of pencils We need to find out how many packs of pencils Dario can buy.

Solve a Two-Step Equation Frequently algebra tiles are used to model equations. You might see algebra tiles on the FSA so you should know what they mean! Each “x” represents one occurrence of the unknown number. Each “1” represents one unit or a one. Sometimes “+” is used in place of the “1” to represent one unit.

Solve a Two-Step Equation Take away five ones Remember the scale? Whatever you do to one side of an equation, you must do to the other side to keep it balanced.

Solve a Two-Step Equation Two occurrences of “x” would look like 2x. Recall that the touching operator is Multiply! The opposite of multiply by 2 is divide by 2. Remember to do this on both sides of the equation!

Solve a Two-Step Equation Use algebra tiles to model and solve this problem. Your turn to try! Copy this down. = x x x + + + + + + + +

Solve a Two-Step Equation It’s a balancing act! = x + = x + = x + x = 2

Solve a Two-Step Equation As with one-step equations, you solve two-step equations working backwards. Think about the following question: Did you notice anything special about the order in which the operators were handled when you solved the previous problem? Discuss with your shoulder partner: Predict a rule for the order you should handle the operators when working backwards. Share with the class: What pattern did you notice during the examples?

Solve a Two-Step Equation What will you do to “undo” plus 3? Remember, you always start ON THE VARIABLE side!

Solve a Two-Step Equation Notice the use of the fraction bar for division.

Draw a wall and begin by “undoing” the addition on both sides. Now You Try! Draw a wall and begin by “undoing” the addition on both sides. Remember, use the Order of Operations in reverse! 3x + 6 = 18 - 6 = - 6 3x = 12 3 3 x = 4 3n + 4 = 13 - 4 = - 4 3n = 9 3 3 n = 3 3(4) + 6 = 18 3(3) + 4 = 13

Solve a Two-Step Equation Subtraction is handled the same way! Just use inverse operations.

Solve a Two-Step Equation It doesn’t matter where the variable is located. You must “undo” all addition and subtraction on the variable side first!

Draw a wall and begin by “undoing” the subtraction on both sides. Your Turn Again! Draw a wall and begin by “undoing” the subtraction on both sides. Remember, use the Order of Operations in reverse! 5x - 4 = 16 + 4 = + 4 5x = 20 5 5 x = 4 8 + 7m = 50 - 8 = - 8 7m = 42 7 7 m = 6 5(4) + 4 = 24 8 + 7(6) = 50

Key Concept So, what exactly does this mean? We solve problems working forward. We solve for variables working backward. So, we solve problems using the Order of Operations. We solve for variables using the Order of Operations in REVERSE!

Real-World Example 4.50 + 2.50r = 22.00 - 4.50 2.50r = 17.50 2.50 Find key words! Real-World Example Let r = the number of rides you can afford Look for any words that mean add, subtract, multiply or divide. Look for the statement of equality. It tells what is on one side of the equal sign. 4.50 + 2.50r = 22.00 - 4.50 2.50r = 17.50 2.50 r = 7 So, you can afford seven rides.

Real-World Example 8.50 + 3.75e = 19.75 - 8.50 3.75e = 11.25 3.75 Let e = the number of pairs of earnings Ava bought Check with your shoulder partner when you are finished. 8.50 + 3.75e = 19.75 - 8.50 3.75e = 11.25 3.75 e = 3 So, Eva bought three pairs of earrings.

Let’s Recall What You’ve Learned In your spiral, in your own words write the steps for solving a two-step equation. On page 398 complete question numbers: 1, 3, 5 and 7 When you’ve finished, discuss your solutions with your shoulder partner. Make any revisions necessary.

Time to Practice! Complete pages 113 – 114 odd in your workbook. Use lined paper and show your work! Remember to keep your equations balanced.