Download presentation

Presentation is loading. Please wait.

Published byDwight Fetters Modified over 2 years ago

1
**Do Now 10/22/13 + 7 = 10 = ? Copy HW in your planner.**

Text p. 74, #1-3, 8-13, 38, 39, & 41 In your journal, describe the PROCESS (steps you would take) to solve the following question. Then solve. What is this an example of? + 7 = 10 = ?

2
Objective SWBAT solve equations using addition and subtraction

3
**Section 2-5 “Solving Equations Using Addition & Subtraction”**

mathematical sentence formed by placing an “=” between two expressions y – 8 = 12 22 = 14 + z 5 ÷ x = 30 11a = 121

4
Equation x + 7 = 10 Left side Right side ‘x’ has to be 3 in order to make the equation balanced. Like a scale, the left side and right side must be the same in order to be balanced!

5
**How can you get the “unknown” by itself?**

m + 24 = -18 “Undo” the operation by using the INVERSE (opposite) operation to both sides of the equation.

6
**Solving Addition Equations…**

Isolate the variable! Get ‘m’ by itself. m + 24 = -18 To get the ‘m’ by itself get rid of “adding 24.” –24 – 24 Do the opposite. “Subtract 24.” m = -42 Whatever you do to one side of the equation you must do the other side. -18 – 24 -18 + (-24) “opp-opp” -42

7
**m = -42 m + 24 = -18 (-42) + 24 = -18 -18 = -18 Check Your Work!**

-18 = -18 Are both sides equal?

8
**Try It Out 1). (6) + 7 = 13 1). x + 7 = 13 2). -7 = 9 + (-16)**

1). (6) + 7 = 13 2). -7 = 9 + (-16) 3). -3 = (-10) + 7 4).(-9) + 40 = 31 1). x + 7 = 13 2). -7 = 9 + h 3). -3 = x + 7 4). f = 31

9
**Solving Subtraction Equations…**

Isolate the variable! Get ‘y’ by itself. -13 = y –15 To get the ‘y’ by itself get rid of “subtracting 15.” +15 +15 Do the opposite. “Add 15.” 2 = y Whatever you do to one side of the equation you must do the other side.

10
**2 = y -13 = y – 15 -13 = (2) – 15 -13 = -13 Check Your Work!**

Are both sides equal?

11
**Try It Out 1). (4) - 7 = -3 1). t - 7 = -3 2). 6 = (3) – (-3)**

3). 40 = (61) – 21 4). -15 = (-8) - 7 1). t - 7 = -3 2). 6 = x – (-3) 3). 40 = r – 21 4) = p - 7

12
24 Homework Text p. 74, #1-3, 8-13, 38, 39, & 41

Similar presentations

OK

Do Now 10/29/13 CCCCopy HW in your planner. TTTText page 470, #8-34 evens IIIIn your notebook, answer the following question. SSSSally.

Do Now 10/29/13 CCCCopy HW in your planner. TTTText page 470, #8-34 evens IIIIn your notebook, answer the following question. SSSSally.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on festivals of india Ppt on bond length formula Ppt on embedded c programming What does appt only mean one thing Ppt on railway track design Ppt on self awareness exercises Download ppt on brain chip technology Ppt on law against child marriage bangladesh Ppt on power crisis in india Unified communications microsoft ppt online