Presentation on theme: "Let the humongosity begin!"— Presentation transcript:
1Let the humongosity begin! Naming Large NumbersLet the humongosity begin!
2Counting isn’t enoughAs you may have already heard, ancient people would make marks to stand for the amounts of things.| | | |That’s fine for a few things… but when you see| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |then understanding how much you have is a challenge.
3Voila! The Decimal number system We recycle the same ten symbols – but they’re worth more in a different position, in the same way that a ten dollar bill is worth more than a 1 dollar bill, even if the piece of paper is the same size.This is the slide show for people who already know how to name numbers up to If you want to review that, go to the first slide show in this set, 094NamingSmallNumbers .
4The “thousands” family. The fourth, fifth and sixth places in a decimal number stand for “thousands.”1,000 is one thousand.The three digits afterward mean that these digits don’t just stand for one puny thing – one goldfish, one bicycle or one sweaty sock – but they stand for a group of one thousand of whatever you’re counting.Thus,6,000 means six *thousand* sweaty socks or goldfish.
520 rolls of 50 pennies (50 x 20) 1000 pennies If you want to see more pictures of lots and lots of things…(http://kokogiak.com/megapenny/default.asp )
6One thousand pennies (5 columns, 5 rows, 40 pennies in each stack… 25 x 40 or 5 x 200; either way…
7(http://kokogiak.com/megapenny/default.asp ) If you want to see more pictures of lots and lots of things… 2/visualizing-billions.html
8Enough distraction already! The names, the names! So… the numbers in the fourth fifth and sixth places are in the Thousand group. We can name that clump as if it were its own number, and then add “thousand” to it to show we’re really talking about something a thousand times as big.In “proper math grammar,” we do not say “and,” since that’s reserved for adding things *less* than one (“one and a half” pounds or “one and 3 tenths of a mile”)6,000 = six thousand
92,000 = two thousand12,000 = twelve thousand56,000= fifty-six thousand100,000 = one hundred thousand’232,000 = two hundred thirty two thousandRead the smaller number in front of the comma, then add “thousand” to show how much it is worth based on its position.
10Watch for zeroes! 208,000 = Two hundred eight thousand. There aren’t any tens… but we don’t say it. We still have to put that amount – none – in the space.Four hundred six thousand = 406,000
11Your turn! Write these out in words. 34,000 ________________________ 34,000 ________________________8,000 __________________________18,000___________________________111,000_______________________________408,000 _______________________________For your really kinesthetic learners, have ‘em highlight the part they’re naming.(in the really good version, you want them to be able to drag the name from little buttons with the names on them that you can hear if you click on them.)
1234,000 thirty-four thousand8,000 eight thousand18,000 eighteen thousand111,000 one hundred eleven thousand *408,000 four hundred eight thousand **leave out the “and” even if you thought it
13Write these as numbers Three hundred twenty-one thousand Fifty-six thousandOne hundred thousand
14The answers Three hundred twenty-one thousand 321,000 Fifty-six thousand56,000One hundred thousand100,000… so, you read the digits in front of the comma as if they were the only digits there, then add “thousand” to show they are standing for something a thousand times as big.Note to self: remember you have to say to put in the zero… This is for the “programmable” version.Make up five of your own numbers and their answers. See if they’re right!
15Okay, what about the millions? 998,000 = nine hundred ninety-eight thousand999,000 = nine hundred ninety- nine thousand……. What’s next?1,000, a THOUSAND THOUSAND.But that’s not what we call it. Hey, it gets another comma, and its own name.This is what a “million” is all about.
17Millions work the same way as thousands; they’re just a thousand times as big as a thousand.. 3,000,000 is three million.147,000,000 is one hundred forty-seven million.Look for patterns Your turn to try these! Click when you’re ready to check the answers.14,000,000 _________________100,000,000244,000,000Need more examples? Click here.(In the programmed version, if you miss ‘em you get to go see those more examples. )
18Millions work the same way as thousands; they’re just a thousand times as big. 14,000,000 fourteen million100,000, a hundred million244,000,000 two hundred forty-four millionNeed more examples? Click here.(In the programmed version, if you miss ‘em you get to go see those more examples. )
19Try writing numbers for these: Twelve millionTwenty millionTwo hundred twenty-two million
20Try writing numbers for these: Twelve million – 12,000,000Twenty million – 20,000,000Two hundred twenty-two million222,000,000The six zeroes tell you you’re talking about the millions.
21Then Billions.Imagine a *thousand* rooms with a million dollar bills in them (like the picture of a million). That’s what a billion would look like. It would take a whole building.In numbers, it looks like this:1,000,000, one billion345,000,000,000 – three hundred forty-five billion801,000,000,000 – eight hundred one billion
22Name these numbers45,000,000,000100,000,000,000727,000,000,000
23Name these numbers 45,000,000,000 Forty-five billion 100,000,000,000 one hundred billion727,000,000,000 Seven hundred twenty-seven billion
24Write this as digits Thirteen billion Nine hundred ninety nine billion One hundred eleven billion
25Write this as digits Thirteen billion 13,000,000,000 Nine hundred ninety nine billion999,000,000,000One hundred eleven billion111,000,000,000
26Then TRillions.Imagine a *thousand* buildings with a thousand rooms with a million dollar bills in them (like the picture of a million). That’s what a trillion would look like. It would take a whole block…In numbers, it looks like this:1,000,000,000, one trillion335,000,000,000,000 – three hundred thirty- five trillion601,000,000,000,000 – six hundred one trillion
28Here are their names: 3,000,000,000,000 three trillion 17,000,000,000, seventeen trillion111,000,000,000, one hundred eleven trillion532,000,000,000,000 five hundred thirty-two trillion901,000,000,000,000 nine hundred one trillion
29Write these as digitized numbers Five hundred sixty-five trillionNine trillionNine hundred trillionSix hundred thirty-seven trillionTwo hundred three trillion
30Write these as digitized numbers Five hundred sixty-five trillion 565,000,000,000,000Nine trillion9,000,000,000,000Nine hundred trillion900,000,000,000,000Six hundred thirty-seven trillion637,000,000,000,000Two hundred three trillion203,000,000,000,000
31Let’s combine the groups. Thousands, millions, billions and trillions – let’s mix ‘em up.You’ll need to figure out two things:the name of the number that the group would be if it were all by itselfThe name of the group to say afterwards…56,000,000….It’s “fifty-six” --- but with six zeroes afterwards, that makes it fifty-six million.
32What’s the name of the group? Name these numbers 413,000,00021,0005,000,000,000101,0006565,000,000,000,000307,000,00091,000,000,000610,000
33What’s the name of the group? Name these numbers 413,000, four hundred thirteen million21, twenty-one thousand5,000,000,000 five billion101, one hundred one thousandsixty-five65,000,000,000,000 sixty-five trillion307,000, three hundred seven million91,000,000, ninety-one billion610, six hundred ten thousand
34Digitize these Seventeen billion Ninety-seven million Ninety-seven thousandTwo hundred eighty-five millionTwo hundred eighty-five billionTwo hundred eighty-five trillionEighty-five thousandTwelve billion
35Digitize these Seventeen billion 17,000,000,000 Ninety-seven million ,000,000Ninety-seven thousand ,000Two hundred eighty-five million ,000,000Two hundred eighty-five billion 285,000,000,000Two hundred eighty-five trillion ,000,000,000,000Eighty-five thousand ,000Twelve billion ,000,000,000
36Next up – more significant figures… Next show will go over how to name large numbers that don’t have a lot of zeroes at the end.