Reply
Thu 2 Sep, 2004 11:46 am
Hi all.
Would someone mind explaining to me the basic rules of solving Integers, & evaluating/simplifying Algebraic expressions?
Thanks.
Jess
You might need to say a little more about it. Neither integers like:
4
or algebraic expressions like:
x + y
have anything about them to solve. Explain a little more about what you need, please.
Sorry.
Integers: (-3) - (-4)(+5)
------------------
(-2)
Simplify: 40st
-------
4
Evaluate: (22x - 12) - (-13x + 2)
Is that okay?
Real quick:
-- = +
+- = -
Maybe you want to know about order of operations. Do what's in parenthesis first, otherwise multiplication/division before addition/subtraction. Then you want to distribute your negative signs to eliminate parentheses.
So for your examples:
(-3) - (-4)(+5) (assuming that + is only there to indicate positive)
You would multiply -4 x 5 first, getting -20.
(-3) - (-20) = -3 +20 = 17
40st cannot be simplified
(22x - 12) - (-13x + 2) distribute first, since there is no multiplication or division
22x -12 +13x -2 = 35x -14
40st / 4 can be simplified--both 40 and 4 are divisible by 4.
The simplified expression is 10st / 1 = 10st
Ah, good catch lab rat, I didn't realize that was division that was going on there. GirlA, you'll want to adjust what I gave you to account for the division in both of those.
lab rat wrote:40st / 4 can be simplified--both 40 and 4 are divisible by 4.
The simplified expression is 10st / 1 = 10st
If the problem was:
40st
-----
4
Then the simplest way to look at it, which differs only a tiny bit from lab rats is:
40/4 = 10
40st/4 = 10st
remember that 40st is the same as 40 times s times t.