### Scribe Post

Sunday, April 19, 2009
On Friday we pretty much went over the homework from the day before, then we got a double-sided paper with a bunch of questions on it for homework.
Here's an example of an adding question. :]
A.
The first thing you have to do is find the common denominator. (it's best to find the lowest common denominator.)
The easiest way to find it is by multiplying the denominators. In this question, 4 multiplied by 5 gives you 20, which is the denominator. But multiplying isn't always the best solution.
Remember, what you do to the bottom, you must to do the top:
- you multiplied 4 by 5 to get 20, so you have to multiply 1 by 5, which gave you 5.
- you multiplied 5 by 4 to get 20, so you have to multiply 3 by 4, which gave you 12.

Here's an example of a subtraction question.
B.

Just like the last question, you have to find the smallest common denominator, which is 18. But you shouldn't multiply for this one. Instead, just look (or think) for the smallest common denominator that both numbers fit into.
Also like the last question, make sure you do the same to the top as you did to the bottom.
And last, you subtract the numerators, and then you get your answer.

Bracket question:
M.
In this question, you must do the brackets first. The same rules apply, you must find the lowest common denominator, which is 4. Make sure you do the same to the top as you did to the bottom, and then add the numerators.
Then, write the answer from the brackets (five eighths) and bring down the numbers outside of the brackets. Find the lowest common denominator, do the same to the top as you did to the bottom, add the numerators together, and you get your answer.

Word problem:
Q. Kent walked 3 fourths of a mile on Monday. On Tuesday, he walked 1 eighth of a mile less than on Monday. How far did he walk altogether?

Make sure you do both sides of the page! :]