Presentation on theme: "Let the humongosity begin! As you may have already heard, ancient people would make marks to stand for the amounts of things. | | | | That’s fine."— Presentation transcript:
As 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.
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 1000. If you want to review that, go to the first slide show in this set, 094NamingSmallNumbers.
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.
If you want to see more pictures of lots and lots of things… http://wehrintheworld.blogspot.com/2009/0 2/visualizing-billions.html http://wehrintheworld.blogspot.com/2009/0 2/visualizing-billions.html
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
2,000 = two thousand 12,000 = twelve thousand 56,000= fifty-six thousand 100,000 = one hundred thousand’ 232,000 = two hundred thirty two thousand Read the smaller number in front of the comma, then add “thousand” to show how much it is worth based on its position.
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
Write these out in words. 34,000 ________________________ 8,000 __________________________ 18,000___________________________ 111,000_______________________________ 408,000 _______________________________
34,000 thirty-four thousand 8,000 eight thousand 18,000 eighteen thousand 111,000 one hundred eleven thousand * 408,000 four hundred eight thousand * *leave out the “and” even if you thought it
Three hundred twenty-one thousand Fifty-six thousand One hundred thousand
Three hundred twenty-one thousand 321,000 Fifty-six thousand 56,000 One hundred thousand 100,000 … 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.
998,000 = nine hundred ninety-eight thousand 999,000 = nine hundred ninety- nine thousand… …. What’s next? 1,000,000 --- 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.
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 _________________ 100,000,000 244,000,000
14,000,000 fourteen million 100,000,000 a hundred million 244,000,000 two hundred forty-four million
Twelve million Twenty million Two hundred twenty-two million
Twelve million – 12,000,000 Twenty million – 20,000,000 Two hundred twenty-two million 222,000,000
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: 1,000,000,000 -- one billion 345,000,000,000 – three hundred forty-five billion 801,000,000,000 – eight hundred one billion
Thirteen billion Nine hundred ninety nine billion One hundred eleven billion
Thirteen billion 13,000,000,000 Nine hundred ninety nine billion 999,000,000,000 One hundred eleven billion 111,000,000,000
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: 1,000,000,000,000 -- one trillion 335,000,000,000,000 – three hundred thirty- five trillion 601,000,000,000,000 – six hundred one trillion
3,000,000,000,000 three trillion 17,000,000,000,000 seventeen trillion 111,000,000,000,000 one hundred eleven trillion 532,000,000,000,000 five hundred thirty-two trillion 901,000,000,000,000 nine hundred one trillion
Five hundred sixty-five trillion Nine trillion Nine hundred trillion Six hundred thirty-seven trillion Two hundred three trillion
Five hundred sixty-five trillion 565,000,000,000,000 Nine trillion 9,000,000,000,000 Nine hundred trillion 900,000,000,000,000 Six hundred thirty-seven trillion 637,000,000,000,000 Two hundred three trillion 203,000,000,000,000
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 itself The 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.
413,000,000 four hundred thirteen million 21,000 twenty-one thousand 5,000,000,000 five billion 101,000 one hundred one thousand 65 sixty-five 65,000,000,000,000 sixty-five trillion 307,000,000 three hundred seven million 91,000,000,000 ninety-one billion 610,000 six hundred ten thousand
Seventeen billion Ninety-seven million Ninety-seven thousand Two hundred eighty-five million Two hundred eighty-five billion Two hundred eighty-five trillion Eighty-five thousand Twelve billion
Seventeen billion 17,000,000,000 Ninety-seven million 97,000,000 Ninety-seven thousand 97,000 Two hundred eighty-five million 285,000,000 Two hundred eighty-five billion 285,000,000,000 Two hundred eighty-five trillion 285,000,000,000,000 Eighty-five thousand 85,000 Twelve billion 12,000,000,000
Next show will go over how to name large numbers that don’t have a lot of zeroes at the end.