Thank you all again for all the recommendations!!!!
- Meredith
Wednesday, February 19, 2014
Adding Fractions With Like Denominators ('like denominators' is just a way of saying that they have the same number on the bottom)
I just posted a quick one and I think I have time for one more, so I'll do one on how to add fractions with the same number on the bottom (you'll hear them called 'fractions with like denominators').
Say, for example, you have 4/11 + 6/11 (this is read as 4 over 11 plus 6 over 11, and it would probably benefit you to write this down on a piece of paper straight up and down, just so you can tell the top from the bottom). Since you don't have to change the bottom of the fraction, all you have to do is add the top, straight across.
4+6/11 (to write this straight up and down, write 4+6, then a horizontal bar right underneath that, then write 11 underneath that)
Now, simplify the addition on the top:
10/11 should be your final answer.
NOTE: (you may wonder why you don't add the two 11's on the bottom. Just remember that the only time you mess with denominators is when you multiply or change the denominators. So in this case, you would NOT add the denominators, since they are already the same and since you're not multiplying.)
That was pretty short, so if you need more help on adding fractions with like denominators, go to www.khanacademy.org and a bunch of videos will pop up.
Bye! :)
-Meredith
Say, for example, you have 4/11 + 6/11 (this is read as 4 over 11 plus 6 over 11, and it would probably benefit you to write this down on a piece of paper straight up and down, just so you can tell the top from the bottom). Since you don't have to change the bottom of the fraction, all you have to do is add the top, straight across.
4+6/11 (to write this straight up and down, write 4+6, then a horizontal bar right underneath that, then write 11 underneath that)
Now, simplify the addition on the top:
10/11 should be your final answer.
NOTE: (you may wonder why you don't add the two 11's on the bottom. Just remember that the only time you mess with denominators is when you multiply or change the denominators. So in this case, you would NOT add the denominators, since they are already the same and since you're not multiplying.)
That was pretty short, so if you need more help on adding fractions with like denominators, go to www.khanacademy.org and a bunch of videos will pop up.
Bye! :)
-Meredith
How to Find the Area of a Triangle (Given the Height)
Hey, hey! I'm back, and I only have a little bit of time to post this one because I'm doing it from a school computer, but anyway. This one is going to be about how to find the area of a triangle, if you already know the length of the base and the height of the triangle.
The first thing you need to know is the formula for area of a triangle:
Area=1/2bh (which is read as one half times the length of the base times the height of the triangle)
So, just for example, say you have a triangle with a base length of 8 and a height of 7.
NOTE: (the 'b' in the formula stands for the length of the base and the 'h' stands for the height and you'll sometimes see the area bit as a capital 'A')
Now, plug your values into your formula:
A= 1/2(8)(7)
First you're going to multiply your 1/2 by 8. When you multiply fractions (like 1/2) by whole numbers (like 8) just take the fraction amount of the whole number (take one half of 8). You should get 4 (half of 8 is 4):
A=(4)(7)
NOTE: (when you have numbers right next to each other in parenthesis, you multiply them, so in this case, you would multiply 4 and 7)
4 times 7 is 28 so your area is 28 square units
NOTE:(if you're wondering where the 'square units' came from, just know that whenever you find area, you tack 'square units' on the end; however, if you are using a specific measurement while finding the area [say, in the problem we just worked, you were using 8 and 7 inches, you would have, for your final answer, 28 square inches], put that on the end of the square units part.)
A= 28 square units
Remember, if you need more help on finding the area of a triangle given the height, go to www.khanacademy.org
Bye for now
-Meredith
The first thing you need to know is the formula for area of a triangle:
Area=1/2bh (which is read as one half times the length of the base times the height of the triangle)
So, just for example, say you have a triangle with a base length of 8 and a height of 7.
NOTE: (the 'b' in the formula stands for the length of the base and the 'h' stands for the height and you'll sometimes see the area bit as a capital 'A')
Now, plug your values into your formula:
A= 1/2(8)(7)
First you're going to multiply your 1/2 by 8. When you multiply fractions (like 1/2) by whole numbers (like 8) just take the fraction amount of the whole number (take one half of 8). You should get 4 (half of 8 is 4):
A=(4)(7)
NOTE: (when you have numbers right next to each other in parenthesis, you multiply them, so in this case, you would multiply 4 and 7)
4 times 7 is 28 so your area is 28 square units
NOTE:(if you're wondering where the 'square units' came from, just know that whenever you find area, you tack 'square units' on the end; however, if you are using a specific measurement while finding the area [say, in the problem we just worked, you were using 8 and 7 inches, you would have, for your final answer, 28 square inches], put that on the end of the square units part.)
A= 28 square units
Remember, if you need more help on finding the area of a triangle given the height, go to www.khanacademy.org
Bye for now
-Meredith
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