Tuesday, June 14, 2011

Math Exam Review Slide 23

Adding and Subtracting Fractions
















So the question is 1/2+1/2 = 2/2, but that isn't good enough because you have to always simplify when it can be simplified. So its 1/1 then 1 whole. First you always check for common denominators. If your fractions have the same denominator you leave them the same and just add the numerators.

Subtracting















The question was 3/4 - 1/4=2/4=1/2. ( make sure you don't forget to simplify.) First you check for common denominators. In this question they are the same so just take away the two numerators.

Try these questions to help you practice :).

2/3+4/5=
6/7+2/8=
2/3-1/3=
4/5- 2/5=

Answers...

1. the common denominator is 15. So whatever you did to get 15 u do to the numerators. So 2x5=10 so its 10/3, then 4x3= 12 so its 12/5. So 10+12 = 22 and the denominators stay at 15. Its 22/15. Now you have to simplify it to 1 whole and 7/15.

Since I already told you how to do this I'm just gonna give you the answers now.

2. 1 whole and 3 /28

3.1/3

4. 2/5

Here is a link to help you. :)







GoAnimate.com: Adding and Subtracting fraction by soto


Heres a video to help you (:





6 comments:

joshL814 said...

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daphne906 said...

Nice Job Jackie! I like how you had everything on your blog, you had a video, a link and you explained it very well. Great Job! :)

norien873 said...

Great job Jackie! I really liked the video you had on your scribe post. I also liked all the pictures you had and the different colors you used.

hendrix817 said...

Good job jackie you explained everything very well and very detailed.

Jeremy814 said...

good job jackie! i liked the video you added and i liked the pictures too. keep it up!

Anonymous said...

Good job Jackie! I like your pictures and video and link. Good job!