Download presentation

Published byLawrence Lampert Modified over 3 years ago

1
**10/21/08 Solve with multiplication or division (2-12 B) #26**

Warm-up: Solve the following A. B. C. D. E. F. G. x + 5 = x – 34 = = x – 39 Assignment: (2-12) B evens or odds AND (2-12) puzzle all Show all steps on graph paper in required format. Quiz corrections are due tomorrow for retakes. Math binder scores will be collected tomorrow for lessons #11- #21

2
**10/21/08 Solve with multiplication or division (2-12 B) #26**

Warm-up A. B. C. D. F. G. x + 5= x – 34 = = x – 39 E. X = 4 x = 106 163 = x Assignment: (2-12) B evens or odds AND (2-12) puzzle all Show all steps on graph paper in required format. Quiz corrections are due tomorrow for retakes. Math binder scores will be collected tomorrow for lessons #11- #21

3
**• 2 5 10 = 10 5 2 ÷ = Solving Equations by Multiplying or Dividing**

Course 2 2-12 Solving Equations by Multiplying or Dividing Like addition and subtraction, multiplication and division are inverse operations. They “undo” each other. 2 • 5 10 = 10 5 2 ÷ =

4
**Additional Example 1: Solving an Equation by Multiplication**

Course 2 2-12 Solving Equations by Multiplying or Dividing Additional Example 1: Solving an Equation by Multiplication Solve the equation = 13. Check your answer. h 2 h 2 = 13 h 2 (2) = 13(2) Think: h is divided by 2, so multiply both sides by 2 to isolate h. h = 26 Check h 2 = 13 26 2 ? = 13 Substitute 26 for h. 13 = 13 ? 26 is a solution.

5
**MULTIPLICATION PROPERTY OF EQUALITY**

Course 2 2-12 Solving Equations by Multiplying or Dividing MULTIPLICATION PROPERTY OF EQUALITY You can multiply both sides of an equation by the same number, and the statement will still be true. 3 · 4 = x = y 2 · 3 · 4 = 2 · 12 zx = zy 6 · 4 = If a variable is divided by a number, you can often use multiplication to isolate the variable. Multiply both sides of the equation by the number.

6
**Insert Lesson Title Here**

Course 2 2-12 Solving Equations by Multiplying or Dividing Insert Lesson Title Here Try This: Example 1 x 5 Solve the equation = 30. Check your answer. x 5 = 30 x 5 (5) = 30(5) Think: x is divided by 5, so multiply both sides by 5 to isolate x. x = 150 Check x 5 = 30 150 5 ? = 30 Substitute 150 for x. 30 = 30 ? 150 is a solution.

7
**Additional Example 2: Solving an Equation by Division**

Course 2 2-12 Solving Equations by Multiplying or Dividing Additional Example 2: Solving an Equation by Division Solve the equation 51 = 17x. Check your answer. 51 = 17x Think: x is multiplied by 17, so divide both sides by 17 to isolate x. 51 = 17x 17 17 3 = x Check 51 = 17x 51 = 17(3) ? Substitute 3 for x. 51 = 51 ? 3 is a solution.

8
**DIVISION PROPERTY OF EQUALITY**

Course 2 2-12 Solving Equations by Multiplying or Dividing DIVISION PROPERTY OF EQUALITY You can divide both sides of an equation by the same nonzero number, and the statement will still be true. 5 · 6 = 30 5 · 6 3 = 30 5 · 6 = 10 5 · 2 = 10 x z x = y y = z ≠ 0 You cannot divide by 0. Remember!

9
**Insert Lesson Title Here**

Course 2 2-12 Solving Equations by Multiplying or Dividing Insert Lesson Title Here Try This: Example 2 Solve the equation 76 = 19y. Check your answer. 76 = 19y Think: y is multiplied by 19, so divide both sides by 19 to isolate y. 76 = 19y 19 19 4 = y Check 76 = 19y 76 = 19(4) ? Substitute 4 for y. 76 = 76 ? 4 is a solution.

10
**Additional Example 3 Continued**

Course 2 2-12 Solving Equations by Multiplying or Dividing Additional Example 3 Continued Beats in 10s times = beats per minutes b · = Think: b is multiplied by 6, so divide both sides by 6 to isolate b. 6b = 78 6b = 78 b = 13 Trevor’s heart beats 13 times 10 seconds.

11
**Insert Lesson Title Here**

Course 2 2-12 Solving Equations by Multiplying or Dividing Insert Lesson Title Here Lesson Quiz: Part 1 Solve the equation. Check your answer. 1. 12 = 4x 2. 18z = 90 3. 12 = = 12y 5. x = 3 z = 5 x 4 x = 48 y = 70 h 22 = 9 h = 198

12
**Show all steps on graph paper in required format.**

10/21/08 Solve with multiplication or division (2-12 B) #26 Show all steps on graph paper in required format. (2-12) B evens or odds AND (2-12) puzzle all Quiz corrections are due tomorrow for retakes. Math binder scores will be collected tomorrow for lessons #11- #21

Similar presentations

OK

Multiplying & Dividing Algebra~ Lesson 6 Remember Addition and Subtraction? Kinda the same idea…

Multiplying & Dividing Algebra~ Lesson 6 Remember Addition and Subtraction? Kinda the same idea…

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on files in c programming Ppt on 9/11 conspiracy 2016 Ppt on how the state government works in india Ppt on guru gobind singh ji Ppt on condition monitoring maintenance Ppt on credit default swaps greece Ppt on motivation concepts Ppt on sugar industry in india Ppt on alternative fuels for i.c engine Ppt on conservation of electricity