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Algebra Lesson 1-2 Order of Operations

Added Sep 14, 2017 •

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alright this one is on the order of operations you'll be evaluating numerical expressions by wheezing the order that ocean and evaluating algebraic expressions using the order of operations so both numerical expressions and algebraic expressions this lesson starts on page 10 in your book if you all alone search find the cost of admission Ghostbuster what are the evaluating so what is it mean to evaluate Elsa fart in the value of the expression is that on your vocab list Fitbit like a bear alright area Passover straight into an example of this one's mine and then you get one to do as soon as possible what's yesterday three to the fifth means to multiply three five times the exponent tells you how many times do you use the base as a factor text so you can use your calculator for this if you need to you should be able to start at least a Time series 9 x series 27 x 331 mm. Last said he might need anyone sorry yes I have what's called in exponent key on your calculator cuz I really know where their exponent key is where you don't have to take 3 * 3 * 3 * 3 * 3 make sure you ask so whether the route of the fifth 243 heads evaluating numerical expression pretty easy here's your three find cheater the 4th for the 5th and 7th to the 3rd today's real quick also to the fourth means to multiply into groups equals to 4 times and give myself enough room and that is equivalent to 16 do that so that I can share the love myself more room for Dead Man's multiply 4 4 4 4 4 4 5 times it was you get for that 1024 1024 and Saturday the 3rd 7 * 7 is 49 * 7 is 340-8343 10 questions on that everybody knows how do you say it's going to eat call what are the operations please excuse my dear Aunt Sally Sam's Club parentheses exponents the multiplication and division those do not necessarily come multiplication and division it depends on what happens first what to write correct so that's why I put a flash here because mankind divided in a problem before you X division on the same level convert from black to white in no problem same thing with addition and subtraction even though a comes before us in PEMDAS that doesn't mean you always add 40 subtract whatever comes first from left to right Ferguson's fine just waiting on your way to get caught up okay so when we evaluate an expression using the order of operations we're going to go for parentheses first there or group symbols that are done and that's one so that no one for exponents I see a change squared so I'm going to go ahead and do the two squares for what I'm going to do multiplication and division from laughter there is no multiplication there is some division here so I'm going to leave this alone what is 8 / 4 tag certain start working too quickly and they just start doing stuff from white no matter what it is make sure that you divide or multiply before you add or subtract you do get a different answer okay and then we're going to add and subtract from web to write 60 - 14 + 14 + 14 is 28 okay hair salons MD how many rides at 11 was called this morning resume that the square there sorry undo go away what go back and now silly ignore me unless I'm in a back this up so it's there yeah I did hold on I'm in the reopen it sorry alright so better we should be mailed to first say 3 + 8442 * 2 and then we'll add and subtract from left to right so 3 + 84 is 8787 - 5 is 8 true you do need to show those steps or what you're doing in each set baby we have exponents that's 8 squared Samuel leave everything else alone for a second what is 64 turbo moving to multiply and divide from left to right Clark I did everything but that I said I'm going to multiply and divide from left to right there's only one multiplication here so 7 * 11 is 77 subtraction and addition rap from what to write 20 - 7 is 13 13 + 6477 - 77 + 0 I was going to say song affects both of us after this hour so hopefully it won't get overlooked Birds episode example so we don't have any more notes between example 2 and 3 we're still evaluating but what if we added Subway symbols okay parenthesis brackets and the division sign is also grouping symbol it's also we need to simplify the numerator and the denominator before you divide so in this example adding Roofing symbols in lower right but when I do what's in the grouping symbols first so 10-6 is for the Moto X 4 / 225 * 420 and then add value of two sets of grouping symbols we have parentheses and brackets Rihanna work from the innermost Pepsi out Savannah start with the two plus three so just rewrite everything else 2.3 is 5 okay so we got the simplified the innermost parentheses first now we're going to work in the brackets and we have an exponent 5 squared is 25 a monogram in the back up 32-25 is 7 and then 6 * 7 is 42 negative will not doing with those until later in the year you won't have any today you won't have any negative exponents not for a little while k letter C B division sign access a grouping symbol solution simple pilots in the top and what's in the bottom X-Men in the to keep the Saints mm 15 + 9 is 24/8 - 5 is 3 and this 3 over 24 reduce to 1/8 so service evaluating but now we are grouping symbols where's your check understanding 3 or you try 3 alright I saw people getting 64a we approve to see so don't multiply yet 10-8 is too then multiply from left to right so 20 * 240 + 20 is 60 Play Let It Be we have two sets of princes or Prime season good so we're going to start on the innermost parentheses 3 - 2 is 1 1 squared is 1 + 10 + 1 is 11 right so we have 15 - 11 parsecs that's 4 + 6 is 10 the final result for little babies 10 a letter c 4 + 5 is 9 we're going to square. In the denominator 7 - 4 3-9 square is 81 3 x 3 years 9 so that comes out to be nine letter C Is Mine cushion Laredo to Pharr moving forward or not yep we still have more to do where is that Hobart does okay thank you also the temperature again we're just moving forward there's no note speech for it just says to evaluate an algebraic expression so we moving from numerical expressions to algebraic what makes the algebraic expression different from the numerical but as variables and they're giving us values for those variables that we're going to substitute in so we're going to replace he acts with four coming to replace the Y with amazine with three and I can change those brackets since I already have print season there so they're just replacing XY and Z with the values for 5 and 3 Obama going to evaluate just like we did an example to him three so square plus you get 16 in the parentheses we have 10 and 3 kids Teresa 9/16 4810 + 2737 + + 48 + 37 is 85 questions on that so same thing just substituting values and here's your two this is Chuck understanding for what does a squared times a quantity of 3D + 5 if I see so that's a square divided by and looks good so we're close to and then I think we just have one more left yeah alright so your purse I should be to substitute the values and where the variables are so to be a fence and CS4 don't skip. Seth hey make sure you sent it to them because if you got that stuff out then you're wasting your time with the rest of it but if you don't show about stuff and I don't know what you did to wrong answer so make sure you substitute those values in then we are going to work inside the parentheses I'm going to go ahead and square two and then in the parentheses x 4 you add so in the the face K 18 + 5 is 23 now multiplication and division from left to right so 4 * 23 is 92 + what's 92 / 423 Skype don't skip steps also gotta be willing to substitute for City 3 / f and 12th of July multiply 5 x 420 and then in the parentheses 18 is 12 is 620 + 6 is 26 questions okay no I mean I did my 45 * 420 you could have waited to do that and so you could have liked more started in the parentheses and multiplied first Emmet subtracted and waited so there could be an extra step in there what else did you do extra Scott Park yeah that's fine if you waited to do that not in the parentheses so technically it's not in the first set so that the volume of a sphere missing something more the volume of a sphere is 4.0 pi x the radius R to the third power hey babe expression for the volume got to pay attention Mama's done and we are almost out of time so writing an expression for this 10 biggest with me cuz we're not going up Tommy at 9:30 right two minutes so do this will make the Stabilitrak understanding 5 Serbian would be 4/3 pie x the radius to the third power so you're just changing the verbal expression to the algebraic that is the formula for the volume of a sphere in case you didn't know that like about three dimensional K and I'm going to use it to find the volume of the 3-foot radius sphere used for SAS said it made the problem to SOS stands for science on a sphere peso going to substitute Stay With Me by 3 foot radius wear what's three cheers 27 okay how to make multiply 4/3 pi by 27 the reader for * pi * 27 and then divided by 3 4.7 B's all over one basically tech support 5 * 27 mm / 3 is they left it in terms of Pi 36 pi concentrate on the 27 9 x so that's four times nine is 36 and they left it in terms of Pi okay

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Algebra Lesson 1-2 Order of Operations

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