Download presentation

Presentation is loading. Please wait.

Published byJulian Vaughan Modified over 4 years ago

1
Frigid Fridays On each Friday last January, the temperature was a record low temperature for the date. On Friday, January 30, the mercury dropped to 5°F, which was 7 degrees higher than the low temperature on the Friday before. The low on January 9 was 2 degrees lower than the low temperature on January 16. On the first Friday of the month, the low temperature was 3 degrees lower than that on January 23. The low temperature on the Friday in the middle of the month was 6 degrees higher than the low temperature on the first Friday. The temperature on the first Friday, January 2nd was -5°F. What was the low temperature reading for each Friday of the month?

2
**Solution Date Low Temperature Reading January 2 -5°F January 9 -1°F**

3
Subtracting Integers Lesson 3-5

4
**First let’s review adding integers!**

When the signs are the same, add the integers and keep the sign. When the signs are different, subtract the integers and keep the sign of the larger digit.

5
**Add Integers 13 18 + (-5) = -25 -10 + (-15) = 16 6 + 10 = -5**

-38 18 + (-5) = -10 + (-15) = = = -18 + (-20) =

6
**Rule for subtracting integers**

To subtract integers, add the opposite. What does this mean? Keep, Change, Change Keep the 1st integer the same Change the subtraction sign to addition. Change the sign of the second integer. Then follow the rules for addition.

7
Let’s try an example. -5 – (-2) keep, change, change Opposite sign subtract and keep the sign of the larger digit. = -3

8
**Let’s try an example -4 – 3 -4 + (-3) keep, change, change**

Same sign add the integers and keep the sign. -4 + (-3) = -7

9
**Example 6 – (-4) Keep, Change, Change 6 + 4 10**

Now follow the rules for adding integers!

10
**Example -5 – 8 Keep, Change, Change -5 + -8 -13**

Now follow the rules for adding integers!

11
**Example 18 - 20 Keep, Change, Change 18 + -20 -2**

Now follow the rules for adding integers!

12
**Time for some practice! -14 -9 – 5 = 27 – (-8) = -3 – (-1) = 35**

-8 – 9 = 14 – 17 = 4 – (-19) = 35 -2 -17 -3 23

13
**One more time what is the rule?**

Add the opposite. Keep, Change, Change Keep the 1st integer, Change the sign to addition, Change the 2nd integer. Then follow the rules for adding integers.

14
Don't Forget Homework: Lesson 3-5 # 2-24 evens

Similar presentations

OK

1 Copyright © 2013 Elsevier Inc. All rights reserved. Appendix 01.

1 Copyright © 2013 Elsevier Inc. All rights reserved. Appendix 01.

© 2018 SlidePlayer.com Inc.

All rights reserved.

To ensure the functioning of the site, we use **cookies**. We share information about your activities on the site with our partners and Google partners: social networks and companies engaged in advertising and web analytics. For more information, see the Privacy Policy and Google Privacy & Terms.
Your consent to our cookies if you continue to use this website.

Ads by Google

Ppt on advertisement in hindi language Ppt on holographic display technology Ppt on domain and range of functions Ppt on creativity and innovation Morphological opening ppt on mac Ppt on internet services for class 7 Ppt on elections in india downloads Ppt on polynomials for class 9 free download Ppt on learning styles Ppt on conservation of momentum problems