Friday, April 16, 2010

Subtracting Integers .


Today in math we learned how to subtract integers.

5 - 2 =3




(-5) - (-3) = 2


Show using chips :
(-7) - (-3) =
3 - (-4) =
(-6) - 2 =

(-2) - (-5) =



This morning it was -2. This afternoon will be 3. Determine the difference of these temperatures.

Method 1)
Subtract the morning temperature from the after noon temperature.
3 - (-2) = 5

Method 2)
Subtract afternoon temperature from the morning temperature .
(-2) - 3= 5


Sorry if it's confusing, I tried my best to explain it :)


16 comments:

  1. Awesome Job Allison! I like how used enough color but when you put "Show using chips" you shouldn't have used the color gray, because it is to light. I liked the video and site you picked. I found having the poem Mr. Isfeld made (When subtracting something that isn't there, use a zero pair!) colored and big was a great way for people to see, so they can keep practicing. Anyways, great job! (:

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  2. Allison your blog gets better every time you do it.

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  3. Great job Allison! I found this scribe creative and colorful I really liked the colors that you used and how you used them. Your pictures are great and the video helped me understand subtracting integers more. Good job for choosing a good website and I really like what you did with the poem. Keep up the good work!:D

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  4. Nice job Allison! I think you did an outstanding job with this and I like how you didn't overuse the colours. Your post was very helpful too and is easy to understand. I think you did an amazing job with this. Keep up the great work!

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  5. Good job Allison! I really like the different colours you used and the video you posted. The post is very neat and easy to read. Good job!

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  6. Good job Allison! I liked the pictures and the video helped me understand subtracting integers more better. The integer chips don't really look like integer chips at all but everything else is OK.

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  7. Great job Allison! I liked the images and font. It was organized also. I didn't understand what you did with the second image. You put "(-5)-(-3)=2" but you subtracted -2. Overall it was COOL.

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  8. Good job Allison. The pictures are really easy to understand and the video is good too.

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  9. Good job Allison and you do get better everytime you do the blog. I really liked the pictures, and also the video. The were both easy to understand.

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  10. Great job Allison!
    I found this scribe creative and colorful I really liked the colors that you used and how you used them. Your pictures are great and the video helped me understand subtracting integers more. Good job for choosing a good website and I really like what you did with the poem. Keep up the good work!

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  11. Good job Allison, I like your pictures they all stand out. The colours on your blog are great. I like how you use different font colours and sizes. The video was great and the website was nice too. Keep up the great work, you always have outstanding blogs. (:

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  12. Good job Allison! I really like that your post is neat and also very clear to read. Keep up the great work Allison!

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  13. Nice job Allison! Great job on finding a video. It was nice and organized, i like the colors your chose to put on your images and text.

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  14. Good job!It was really helpful and I think that you did a great job on your blog.

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  15. great job!! everything is well organized and neat!

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  16. Good job Allison. The pictures were great. The video helped me a lot. I liked how you made your font bigger and I also liked how you used different colors. Your post is very oraganized. Anyways good job.

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