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Course: CAHSEE > Unit 1
Lesson 1: CAHSEE- CAHSEE practice: Problems 1-3
- CAHSEE practice: Problems 4-9
- CAHSEE practice: Problems 10-12
- CAHSEE practice: Problems 13-14
- CAHSEE practice: Problems 15-16
- CAHSEE practice: Problems 17-19
- CAHSEE practice: Problems 20-22
- CAHSEE practice: Problems 23-27
- CAHSEE practice: Problems 28-31
- CAHSEE practice: Problems 32-34
- CAHSEE practice: Problems 35-37
- CAHSEE practice: Problems 38-42
- CAHSEE practice: Problems 43-46
- CAHSEE practice: Problems 47-51
- CAHSEE practice: Problems 52-53
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CAHSEE practice: Problems 10-12
CAHSEE Practice: Problems 10-12. Created by Sal Khan.
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- For anyone who will be taking the CHSPE, these videos are great tools for studying for the exam. Practice hard and pass that test!(4 votes)
- The CAHSEE no longer exists starting January 1, 2016.(0 votes)
- I took the CAHSEE last month, I was just 1% off of passing the test! >.<(2 votes)
- Yes and no some of the questions can be easy(1 vote)
- could you also do 2/3 to the 6th power?(3 votes)
- Why was the Cahsee so easy? And why does only California require it?(1 vote)
- CAHSEE stands for CAlifornia High School Exit Examination; it's just for California. The reason the CAHSEE is easy for many people is because it is designed to allow a majority to pass the test.(5 votes)
- I have taken this test four times, I have tried my hardest all four times. I am not an idiot, there is just some people who do not test well under pressure.(1 vote)
- I would tell my students the following... sometimes it helps...
Your brain can only generate so much 'energy' at one time, you choose what to spend that 'energy' on.
If you are taking a test you are spending a certain amount of mental energy on the test... if you are also worrying about the outcome you are wasting precious energy on an activity that cannot possibly contribute to your success.
To do better on tests you must stop worrying how you will do on the test.
Think about when you are most focused, most 'in the moment'... when you are playing a game. Take that mindset to testing, learn to 'play' the test... treat it as a challenge to be overcome, not feared.
When you can learn to stop caring whether or not you 'win' and enjoy 'playing' the test, you will do much better.(3 votes)
- how is the scientific notation a negative if its going to the right? right is positive?(1 vote)
- When you go to the right you are going to the positive side(1 vote)
- Are you sure that this isn't the 2nd grade exit exams?(1 vote)
- i’m taking the chspe does this help?(1 vote)
- What grade is this? This is so easy. I'm only in 6th grade. Is it only in California?(1 vote)
- an overall question about the cahsee. which part of the test is considered the hardest. i don't need too much detail just an overall idea so i know how to review.(1 vote)
Video transcript
Problem 10. John uses 2/3 of a cup of oats
per serving to make oatmeal. How many cups of oats does he
need to make 6 servings? So he uses 2/3 per
serving, and he's going to have 6 servings. So it's going to be 6 times--
for every serving there's 2/3, so it's going to be
6 times that. So it's going to be 2/3 per
serving, and we can even put units there. We could say 1 over servings. Well, that just confuses it. 2/3 per serving times
6 servings. So that's just 6 times 2/3. And that is equal to-- maybe
it's easier to visualize in your head as multiplying
two fractions. We can write that as 2/3 times
6/1, and that's equal to-- we could simplify it
ahead of time. Or we can just write that as 2
times 6 in the numerator-- which is 12-- and the
denominator is 3 times 1-- which is 3. Multiplying fractions is far
easier than adding or subtracting. Because literally the new
numerator of the product is just the product of the
numerators, and then the denominator of the product is
just the product of the denominators. 2 times 6 is 12. 3 times 1 is 3. And 12/3-- that's the same thing
as 12 divided by 3-- that just equals 4. Which is choice B right there. Another way you could have
done it is you could have simplified it right here. You could have divided the
6 and the 3 both by 3. So if you had 2/3 times 6/1,
you could divide the 6 by 3 and the 3 by 3. So you get 1, and then you just
get 2 times-- sorry, 6 divided by 3 is 2. So you have 2 times 2 is equal
to 4, over 1 times 1. And the whole reason why you
could do that is this thing right here, instead of solving
it up here, I could have rewritten it as 2 times
6 over 3 times 1. And then you could simplify it
before getting to this stage. You could just divide the
6 by the 3, and you get a 1 and a 2. 6 divided by 3 is
2, you get 4. I'm probably beating a dead
horse, but just in case you need a review multiplying
fractions, you just got it. Which expression represents
0.0000007 in scientific notation? So the easy way to convert
scientific notation, especially when you have a
number behind the decimal point like this, is you
literally just count the digits behind the
decimal point. And we have 1, 2, 3,
4, 5, 6, 7 numbers behind the decimal point. So our answer is
going to be 7. This 7, right here, 7 times 10
to the-- it's going to be a negative exponent because
we're going less than 1. We're going behind the
decimal point. 10 to the minus-- and
I just counted. 1, 2, 3, 4, 5, 6, 7. 10 to the minus 7. Right there. And if you find this problem a
little bit daunting, I have actually two videos where
I go into depth about scientific notation. So you might want to watch
those, just in case you run into the opposite situation. If you had 7,000, and you
want to write that in scientific notation. So in this case we're going
above, we're going into the positive domain. Then, instead of just counting--
when we had a decimal, you counted
the actual digits. You included the 7, right? That's where you got
10 to the minus 7. When you have something like
this, you just count the 0's. So 7,000 would be 7 times
10 to the third. If you want more of the
rationale of why that works, I definitely recommend that you
watch the two videos that I have on scientific notation. Next problem. The Venn diagram below shows
the number of girls on the soccer and track team
at a high school. So this is the soccer team,
this is the track team. And right here, this is the
girls who are on both the soccer and the track team. How many girls are on both the
soccer and the track teams? So I kind of jumped the gun. They're telling us the
answer right there. There are 6 girls. This overlap region-- right? If some girl is, let's say that
some girl right there, she's in the soccer circle,
and she's also in the track circle. And this number tells us that
there's 6 of these girls. So there are 6 girls that are
on both the soccer and the track teams.