Videos

Aztec Bridge

Added May 05, 2022 •

Copy this URL:
Embed code:	<iframe class="edlio-embed-player" type="text/html" width="640" height="360" src="//ccas.ccusd.org/apps/embed/?v=339101" frameborder="0" allowfullscreen></iframe> Change dimensions

Average

Show Transcript

are you guys walking back to my math Bridge lesson today we're beginning a new unit and we're getting with the first lesson which has to do with averages you may have also heard of the term mean mean a synonym for the same concept of the same thing so far Jackets today we work I want to calculate the average of several numbers in real-world problems if you're going to want to have calculator calculator your phone have it handy we're going to be doing some addition and division AXA to steps for calculating the average let's see what it looks like is going to haircut and the woman is thinking do you know what an average is and he responds yes it's a single number used to represent a group of numbers the number closest to the center of the group of numbers all right interesting interaction here right none of this has ever happened at the barbershop anyways I'll take a look at another example you want to know the average age of your neighbor's three children not sure why anyone would be interested in that for anyways we have John the football player he's seven we have tomorrow the violinist who survived and we have Jean who plays with blocks she's 3 so we have three different ages here so the first step is addition we're going to add all the ages up together so that's what they do here 7 + 5 is 12 + 3 is 50 what's the first I find the total of fifteen and since they have three children we divided by 3 to find the average age into that becomes 5 right it's not always going to work out and I we were in a the average is also the median we haven't talked about that in bridge yet the median is the number middle if you lined up all your numbers from smallest to largest and the number the middle that's the medium in this case the median and the mean are the same but it won't always be that way so averages helpless have an idea of what things cost so lb of apples cost about $0.10 it's really just when we think about averages we really just using generalization right for example of someone who's not from California on average what's the temperature in Los Angeles right now. 70 on average you know if I were to do it mathematically I would take the temperature of each day in Los Angeles all 365 days out of all those two shirts and then divided by 365 that would give me the average temperature of let's save 2021 but but it's just to give us a general ballpark idea have a concert to go to San Diego on average how long is that going to take about 2 hours so you're just giving different examples of where we could use average what the temperature is how many people to things are are there about 25 people on the bus so it's tied into estimations except this isn't just an estimation it's a calculation getting something using math operations next an average knock it was an exact number but instead tells us about what a group of numbers looks like so it says look at the three months of the Sanchez families telephone pills 35 40 48 so again for all your numbers 23 then you would divided by the number of numbers right so in this case I mean the number of months because this is the scenario but sometimes I just be given a set of numbers you out of all the numbers 80 divided by the number of numbers in that set or if we're talking you know in scientific terms you would divide by the number of values in a data set so that's it listen to steps if you were going on vacation want to know what to bring in the way of clothes you might go there and find out what the average temperature is for the time of year when you are going Miami in January is approximately 7 degrees 70 degrees the average will not be the exact temperature but it gives you an idea of the usual so that kind of help all right you were just recapping we've already said the two steps out all the numbers and divide by the divide the answer by the number of items raising her number of items number a number of values in a data set at the same thing so here we are these all up we get 30 and we would see how many numbers we have 1 2 3 4 5 606 number and / 60 the average number is 5 and notice you may have an average that isn't included in your data set data set would be these numbers so that's perfectly fine you can have an average that isn't included in the data set for example five is average but five does not appear in the set that's completely okay all right what was the average score for the class round your answer to the nearest hundredth if necessary first step is to add up all these numbers Supply your calculator player phones alright let me know when you guys get for the some First Solar what number is what number did you guys get for the Sun I guess I'll type in the numbers in calculator write 52 / 6 what did y'all do that would you guys go did anyone get 58 is fine 6666 352 / 6 the appointment so we're going to round to the nearest hundred to the first arrow keys don't move the cursor flipzee packs set up next week and if you're running to the nearest hundred this is a hundreds place we look to the right we have a 6 which falls in the category of fiber greater so this number that number is going to run up to 7 so we can have 58 this one notes to self problem all calculator work you know I know everyone here is familiar with these functions right I mean we're not using any secondary keys or anything it's just another functions so it's really just being able to you know that those numbers incorrectly if you have them incorrectly your answer is going to be so let's grab your phone cabbie calculator 63 + 16 + 70 + 69 + 9 + 56 what number did you guys go 73 273 route 283 16 70 that's why I like when you guys do it as well that way we can compare it to a TV navigate / 6 and we should get 47166 to the 100th is this one right when's it going to rain today okay average price of a car you know you know the perfect you are the perfect thing to use for these is either Google Sheets or Microsoft Excel because with without you can just type in these numbers and then you can we have a function key or you can just put whatever function you want one of those is average so you can just highlight all the numbers get average and doesn't ask for you or 6 2 6 2 6 3 4 690 so this is the number I got when I told everything up and then they tells you that it's 7 Parts Sonia / 7 so now I get this calculator words type all these numbers in I'm up you get this number divided by the number of cars submerged in Nuka enter the average time for the four trips round to the nearest hundred is 42 + 58 + 21 I got 155 the weather for any good 3875 how to make it 1:55 I get the 338 same problems different numbers 31 + 22 + 22 or equal Sims Townsend provinces phone number for 30 to 10:25 long list what's the average number of bagel sold per day all right so why are we out of all of these numbers we got 701 10 days so 701 / 10 I just means we shift the decimal place over one spot to the left hand side when we get 70.1 which is kind of odd in this context because I asked him. so you know this a round to the nearest ten with you know our answer is but in this scenario it would make more sense to say round to the nearest whole number because unlike other items I can you know you can purchase a portion of it right I mean I guess you could sell us a verse on chocolate chocolate bar can be broken down into pieces and we can say oh I sold 1/10 of a chocolate bar meaning I sold an individual chat with Bagels all right in question 24 numbers so I can we add up all our numbers we got 7 97 be divided by 10 because it's 10 work days I just means you move the one spot to left and again we get 79 tell me how do you around it there's no rounding here yeah it's it does tell you to round to the nearest tenth when you when you with your answers already is nothing to round you know if you were to have 797 and they / 10 this is what you get us an answer so so to the they say round to the nearest tenth already to the tenths place the only time we would need a round is if it said round to the nearest whole number then this would go up to 80 sometimes you know they say things like round to nearest and I'll give you a Play Store sometimes it's like you know they telling you doing the instructions but it's not it's not necessary that situation doesn't come up what's 68 + 160 all right 5 I doctor so I got 70-69 1 / 5 81401 Pine Street they say round to the nearest hundredth if necessary it's a I think can be a bit misleading right because you know you may be expecting to get an answer that has a digit in the hundredths place value but when you don't it may throw you off because in the instruction says rounds they have this little probably see if my sister in my opinion I think you should only be list if it is necessary 3 + 15 9 I got 728 / 5 again another problem where is no rounding message the second number calculator realistically you know if they wanted us to round they could have asked us to round to the nearest whole number right in that case you know surrounded on every single answer because every single answer but in recently has given us a decimal so you know if they were to ask Ron to nearest phone number then we would have been I've been rounding in this case came around if necessary however none of these problems are we done how cold is in a position where it was necessary to route when you guys tried going out on your own and then just you guys can unmute route loud let me know when you guys go 95 same question to see numbers yes we are 87 it was easy it would almost make sense to have like a nerd tab open with Google Sheets running and then just have all these numbers in average average I mean it doesn't hurt to do these really that this is where the memorization comes from practice of the train engine that someone she's also learning this Concept in high school would be doing this for hours you know in class everyday hours of homework outside of last year after year so press to do a couple not much what did you guys get for the average you guys have an average for the song 100 you think that I'm a little bit too tight yeah that's that's the hold on that's the longest same problems different question but Kim Possible all right he is noticing that some of these phones like the one we got 100 was asking round to the nearest whole dollar right and unnecessary to say that because it's not going to have practice having a fire extinguisher out of pool righto in case of a fire when will the full ever be I'm firing + 79 + 56 + 73 + 47 255 + 4 175 and here's the nearest cent you know I think that should be fine right usually it's better if they say 210 surrounded so in this case when it's a round to the nearest cent it would be like if our answer went out three decimal places like what's a 679 and the nearest and we got two decimal places so we would need to be rounding the seven and so in order to see if that's Evan goes up to an eight or remains at 7 we look to the nine that's right next to it so if we were to have a 9 x 27 that said go up to 8 but the thing is you know they keep saying including a sentence about rounding in all these slides but you know we've yet to find a problem with me need to I got no rounding here what's the average time spent painting each room okay on 7th it almost seems like a like a joke to me because you know they could say round to the nearest round to the tenths place restaurants of the nearest mall they change it so that it's not necessary I wonder if I mean I wonder what the reason was behind it what is this word b a g or two news phone number I mean I think by now you guys get the point to them 99 Cent Store you're such a short lesson if it does become kind of them okay it's the same amount so it's going to be what were the average age when you have to be 21 if all of your numbers are the same in your data set then the average will be alright find me some grounding 666 they want us round to the hundredths place which is this so because the digits to the right of the hundreds place was in the category of  Evans at the number that's how I did is going to increase by 1.6%. oh shoot I mistake I did it wrong what what I did was I probably will for teenagers in the Abbeys numbers we have courts what's 14 7 see you at 1:36 or 7 and we get 19.42 so this one around to the nearest word finally going to run down to 19 same problems different numbers for 31 4 money 417 oh yeah we need a ride so we have a 5 to the right that's my point that I would pump up 2221 all right.

Uploaded by Daniel Gomez.

Videos

Aztec Bridge

More videos from Daniel Gomez