Ok guys, looks like most of you think its pretty easy, so lets turn it up a notch

http://www.khanacademy.org/v/level-2-exponents?p=Pre-algebra

## Saturday, April 30, 2011

## Friday, April 29, 2011

### Side Quest

Its not exactly algebra but you need to know this before we continue with our algebra journey

http://www.khanacademy.org/v/level-1-exponents?p=Pre-algebra

http://www.khanacademy.org/v/level-1-exponents?p=Pre-algebra

### Before

We'll take a break from algebra for a bit to focus on a concept that will be used a lot while learning algebra.

Negative numbers. Yes, there are things less than zero !

Amazing isnt it! Kinda like your bank account being negative 25 dollars because you were charged an overdraft fee. Now you will need 25 dollars just to make it back to zero dollars! Capitalism at its finest.

Lets get started. First adding and subtracting negative numbers

http://www.khanacademy.org/v/adding-subtracting-negative-numbers?p=Pre-algebra

Second: multiplying and dividing negative numbers

http://www.khanacademy.org/v/multiplying-and-dividing-negative-numbers?p=Pre-algebra

Forward March!

Negative numbers. Yes, there are things less than zero !

Amazing isnt it! Kinda like your bank account being negative 25 dollars because you were charged an overdraft fee. Now you will need 25 dollars just to make it back to zero dollars! Capitalism at its finest.

Lets get started. First adding and subtracting negative numbers

http://www.khanacademy.org/v/adding-subtracting-negative-numbers?p=Pre-algebra

Second: multiplying and dividing negative numbers

http://www.khanacademy.org/v/multiplying-and-dividing-negative-numbers?p=Pre-algebra

Forward March!

## Thursday, April 28, 2011

### Thats it!

1 C.E.

Theodosius of Tripoli (c. 50? CE?)

Pamphila (c. 60 CE)

Heron of Alexandria (fl. 62 C.E.)

Yup, needless to say humanity was doing other things at this time rather than focusing on math.

History shows that whatever they were doing, it was nothing important.

Theodosius of Tripoli (c. 50? CE?)

Pamphila (c. 60 CE)

Heron of Alexandria (fl. 62 C.E.)

Yup, needless to say humanity was doing other things at this time rather than focusing on math.

History shows that whatever they were doing, it was nothing important.

## Wednesday, April 27, 2011

### What are the chances?

Now that we got a foothold in algebra, we can dive into probability.

There are these people called actuaries, they mostly work for insurance companies and are about as close as you can get to real fortune tellers. They are paid about 80,000 USD just to start. They are able to calculate how likely something bad is going to happen to you and based from those calculations your premiums will be figured out.

Now while the math involved in that job is a far cry from what youre about to learn, they had to take this same exact lesson.

http://www.khanacademy.org/v/probability--part-1?p=Probability

There are these people called actuaries, they mostly work for insurance companies and are about as close as you can get to real fortune tellers. They are paid about 80,000 USD just to start. They are able to calculate how likely something bad is going to happen to you and based from those calculations your premiums will be figured out.

Now while the math involved in that job is a far cry from what youre about to learn, they had to take this same exact lesson.

http://www.khanacademy.org/v/probability--part-1?p=Probability

## Tuesday, April 26, 2011

### Level up!

Alright guys, Im glad youre all still with me. Its gonna get a bit rougher

Remember, Fear is the Mindkiller

http://www.khanacademy.org/v/equations-2?p=Algebra

Remember, Fear is the Mindkiller

http://www.khanacademy.org/v/equations-2?p=Algebra

## Monday, April 25, 2011

### A new challenger appears!

Today is a great day, we will be learning a concept that will stay with you for the rest of your academic life and beyond!

Algebra: from the Arabic Al meaning hard and gebra meaning as hell. (j/k)

http://www.khanacademy.org/v/simple-equations?p=Algebra

Math Level: Grade 5

Algebra: from the Arabic Al meaning hard and gebra meaning as hell. (j/k)

http://www.khanacademy.org/v/simple-equations?p=Algebra

Math Level: Grade 5

## Sunday, April 24, 2011

### Division Final Form!

The final boss form of division: Dividing Decimals!

Attack with courage, remember your training, and you will make it back alive!

http://www.khanacademy.org/v/dividing-decimal?p=Arithmetic

Attack with courage, remember your training, and you will make it back alive!

http://www.khanacademy.org/v/dividing-decimal?p=Arithmetic

## Saturday, April 23, 2011

### Picking it up

200 B.C.E.

Diogenes Laertius (c. 200)

Liu Hong (fl. 178-187)

Wang Fan (217-257)

Diophantus of Alexandria (c. 250?)

Sun Zi (c. 250?)

Zhao Shuang (Jun Qing) (c. 260)

Liu Hui (c. 263)

Porphyry (c. 234-c. 305) (Malchus the Tyrian, Porphyrius)

Anatolius of Alexandria (fl. c. 269)

Sporus (c. 280)

Iamblichus (c. 250-c. 350)

Xiahou Yang (c. 350?)

The Chinese join the fray!

Now while this isnt the first instance of Chinese contributors to mathematics, it is the biggest!

This great trend continues for hundreds of years. When all humans have a chance of contributing to something, awesome things can happen.

Diogenes Laertius (c. 200)

Liu Hong (fl. 178-187)

Wang Fan (217-257)

Diophantus of Alexandria (c. 250?)

Sun Zi (c. 250?)

Zhao Shuang (Jun Qing) (c. 260)

Liu Hui (c. 263)

Porphyry (c. 234-c. 305) (Malchus the Tyrian, Porphyrius)

Anatolius of Alexandria (fl. c. 269)

Sporus (c. 280)

Iamblichus (c. 250-c. 350)

Xiahou Yang (c. 350?)

The Chinese join the fray!

Now while this isnt the first instance of Chinese contributors to mathematics, it is the biggest!

This great trend continues for hundreds of years. When all humans have a chance of contributing to something, awesome things can happen.

## Friday, April 22, 2011

### It gets worse

Another update for the timeline, I think we can all appreciate just how bad it is that the entire human race only had six humans contribute to mathematics over the course of 100 years.

100 B.C.E.

Zenodorus (c. 100?? BCE?)

Posidonius (c. 135-c. 51)

Marcus Terentius Varro (116-27)

Zeno of Sidon (c. 79 BCE)

Geminus of Rhodes (fl. c. 77 BCE)

Cleomedes (c. 40? BCE?)

100 B.C.E.

Zenodorus (c. 100?? BCE?)

Posidonius (c. 135-c. 51)

Marcus Terentius Varro (116-27)

Zeno of Sidon (c. 79 BCE)

Geminus of Rhodes (fl. c. 77 BCE)

Cleomedes (c. 40? BCE?)

## Thursday, April 21, 2011

### Part of this

This is important as we get into fractions

http://www.khanacademy.org/video/equivalent-fractions?playlist=Arithmetic

Have no fear!

http://www.khanacademy.org/video/equivalent-fractions?playlist=Arithmetic

Have no fear!

## Wednesday, April 20, 2011

### Level 4

Super Saiyan Level 4 division!

http://www.khanacademy.org/video/level-4-division?playlist=Arithmetic

Final stop before we expand our horizons again!

http://www.khanacademy.org/video/level-4-division?playlist=Arithmetic

Final stop before we expand our horizons again!

## Monday, April 18, 2011

### Downhill

200 B.C.E.

Dionysodorus of Amisus (c. 200?)

Diocles of Carystus (fl. c. 180)

Hypsicles of Alexandria (fl. c. 175)

Hipparchus of Nicaea (c. 180-c. 125)

Umaswati (c. 150)

It’s another slow century and it stays this bad for a couple hundred years.

In this time period, Mathematical advancement is still concentrated in the Mediterranean region

Dionysodorus of Amisus (c. 200?)

Diocles of Carystus (fl. c. 180)

Hypsicles of Alexandria (fl. c. 175)

Hipparchus of Nicaea (c. 180-c. 125)

Umaswati (c. 150)

It’s another slow century and it stays this bad for a couple hundred years.

In this time period, Mathematical advancement is still concentrated in the Mediterranean region

### More

Second level division, numbers get longer this time, stick with it!

http://www.khanacademy.org/video/division-2?playlist=Arithmetic

repetition is key!

http://www.khanacademy.org/video/division-2?playlist=Arithmetic

repetition is key!

## Sunday, April 17, 2011

### We Move

300 B.C.E.

Autolycus of Pitane (fl. c. 300)

Euclid (fl. c. 295)

Aristarchus of Samos (c. 310-230)

Archimedes of Syracuse (287-212)

Philo of Byzantium (fl. c. 250)

Nicoteles of Cyrene (c. 250)

Strato (c. 250)

Persius (c. 250?)

Eratosthenes of Cyrene (c. 276-c. 195)

Chrysippus (280-206)

Conon of Samos (fl. c. 245)

Apollonius of Perga (c. 260-c. 185)

Nicomedes (c. 240?)

Dositheus of Alexandria (fl. c. 230)

Perseus (fl. 300-70 B.C.E.?)

So begins a continual downward spiral in the number of contributors to mathematics, if you know your history you will know that the Roman Empire begins expanding its tentacles outward from the Italian peninsula. It shouldn’t need to be pointed out that their interest in Math and Science was not exactly Greek like

Autolycus of Pitane (fl. c. 300)

Euclid (fl. c. 295)

Aristarchus of Samos (c. 310-230)

Archimedes of Syracuse (287-212)

Philo of Byzantium (fl. c. 250)

Nicoteles of Cyrene (c. 250)

Strato (c. 250)

Persius (c. 250?)

Eratosthenes of Cyrene (c. 276-c. 195)

Chrysippus (280-206)

Conon of Samos (fl. c. 245)

Apollonius of Perga (c. 260-c. 185)

Nicomedes (c. 240?)

Dositheus of Alexandria (fl. c. 230)

Perseus (fl. 300-70 B.C.E.?)

So begins a continual downward spiral in the number of contributors to mathematics, if you know your history you will know that the Roman Empire begins expanding its tentacles outward from the Italian peninsula. It shouldn’t need to be pointed out that their interest in Math and Science was not exactly Greek like

## Saturday, April 16, 2011

### And so it begins..

A new concept, division!

http://www.khanacademy.org/video/division-1?playlist=Arithmetic

This is very useful and is one of the four basic math methods next to addition, subtraction and multiplication.

Once this is mastered we can move on to the great beyond!

http://www.khanacademy.org/video/division-1?playlist=Arithmetic

This is very useful and is one of the four basic math methods next to addition, subtraction and multiplication.

Once this is mastered we can move on to the great beyond!

## Friday, April 15, 2011

### Timeline Update

Unfortunately this is the largest number of names we will have for a few hundred years until the Arabs make their contributions. It all goes down hill from here for a number of reasons

Hippasus of Metapontum (or of Sybaris or Croton) (c. 400?)

Archytas of Tarentum (of Taras) (c. 428-c. 347)

Plato (427-347)

Theaetetus of Athens (c. 415-c. 369)

Leodamas of Thasos (fl. c. 380)

Leon (fl. c. 375)

Eudoxus of Cnidos (c. 400-c. 347)

Callipus of Cyzicus (fl. c. 370)

Xenocrates of Chalcedon (c. 396-314)

Heraclides of Pontus (c. 390-c. 322)

Bryson of Heraclea (c 350?)

Menaechmus (c. 350)

Theudius of Magnesia (c. 350?)

Thymaridas (c. 350)

Dinostratus (fl. c. 350)

Speusippus (d. 339)

Aristotle (384-322)

Aristaeus the Elder (fl. c. 350-330)

Eudemus of Rhodes (the Peripatetic) (fl. c. 335)

## Thursday, April 14, 2011

### Lattice Multiplication

There is a reason they dont really teach this in schools as it is a bit clumsy, not always applicable and would require us to re-teach math basics in some areas.

http://www.khanacademy.org/video/lattice-multiplication?playlist=Arithmetic

Its a great tool in many situations though!

http://www.khanacademy.org/video/lattice-multiplication?playlist=Arithmetic

Its a great tool in many situations though!

## Wednesday, April 13, 2011

### Continue

Now for the next level

http://www.khanacademy.org/video/multiplication-6--multiple-digit-numbers?playlist=Arithmetic

one more step after this

http://www.khanacademy.org/video/multiplication-6--multiple-digit-numbers?playlist=Arithmetic

one more step after this

### Lesson update

Double digits now!

http://www.khanacademy.org/video/multiplication-4--2-digit-times-1-digit-number?playlist=Arithmetic

These are the basics guys, this must be learned before you continue!

http://www.khanacademy.org/video/multiplication-4--2-digit-times-1-digit-number?playlist=Arithmetic

These are the basics guys, this must be learned before you continue!

### Timeline update

400 B.C.E.

Hippasus of Metapontum (or of Sybaris or Croton) (c. 400?)

Archytas of Tarentum (of Taras) (c. 428-c. 347)

Plato (427-347)

Theaetetus of Athens (c. 415-c. 369)

Leodamas of Thasos (fl. c. 380)

Leon (fl. c. 375)

Eudoxus of Cnidos (c. 400-c. 347)

Callipus of Cyzicus (fl. c. 370)

Xenocrates of Chalcedon (c. 396-314)

Heraclides of Pontus (c. 390-c. 322)

Bryson of Heraclea (c 350?)

Menaechmus (c. 350)

Theudius of Magnesia (c. 350?)

Thymaridas (c. 350)

Dinostratus (fl. c. 350)

Speusippus (d. 339)

Aristotle (384-322)

Aristaeus the Elder (fl. c. 350-330)

Eudemus of Rhodes (the Peripatetic) (fl. c. 335)

As you can see the word is out and lots of people are now joining the party

Hippasus of Metapontum (or of Sybaris or Croton) (c. 400?)

Archytas of Tarentum (of Taras) (c. 428-c. 347)

Plato (427-347)

Theaetetus of Athens (c. 415-c. 369)

Leodamas of Thasos (fl. c. 380)

Leon (fl. c. 375)

Eudoxus of Cnidos (c. 400-c. 347)

Callipus of Cyzicus (fl. c. 370)

Xenocrates of Chalcedon (c. 396-314)

Heraclides of Pontus (c. 390-c. 322)

Bryson of Heraclea (c 350?)

Menaechmus (c. 350)

Theudius of Magnesia (c. 350?)

Thymaridas (c. 350)

Dinostratus (fl. c. 350)

Speusippus (d. 339)

Aristotle (384-322)

Aristaeus the Elder (fl. c. 350-330)

Eudemus of Rhodes (the Peripatetic) (fl. c. 335)

As you can see the word is out and lots of people are now joining the party

## Tuesday, April 12, 2011

### It just got real

Multiplication!

http://www.khanacademy.org/video/basic-multiplication?playlist=Arithmetic

Math Level: Grade 4

Please do try to keep up!

http://www.khanacademy.org/video/basic-multiplication?playlist=Arithmetic

Math Level: Grade 4

Please do try to keep up!

### Timeline update

500 B.C.E.

Katyayana (c. 500)

Nabu-rimanni (c. 490)

Kidinu (c. 480)

Anaxagoras of Clazomenae (c. 500-c. 428)

Zeno of Elea (c. 490-c. 430)

Antiphon of Rhamnos (the Sophist) (c. 480-411)

Oenopides of Chios (c. 450?)

Leucippus (c. 450)

Hippocrates of Chios (fl. c. 440)

Meton (c. 430)

Hippias of Elis (fl. c. 425)

Theodorus of Cyrene (c. 425)

Socrates (469-399)

Philolaus of Croton (d. c. 390)

Democritus of Abdera (c. 460-370)

History is doing a much better job at recording the names of the people who contributed to math, its important to note that hard drives are still not available in this time period

## Monday, April 11, 2011

### History Lesson 2

OK class, here are some names you should get to know

This is about 600 B.C.E. on the timeline

Thales of Miletus

Apastamba

Anaximander of Miletus

Pythagoras of Samos (yes that Pythagoras)

Anaximenes of Miletus

Cleostratus of Tenedos

This is about the time when many contributions were made to mathematics, previously we've had one person make some kind of a contribution. Again, math was not high on ancient mans list of things to do

This is about 600 B.C.E. on the timeline

Thales of Miletus

Apastamba

Anaximander of Miletus

Pythagoras of Samos (yes that Pythagoras)

Anaximenes of Miletus

Cleostratus of Tenedos

This is about the time when many contributions were made to mathematics, previously we've had one person make some kind of a contribution. Again, math was not high on ancient mans list of things to do

### Now the opposite

Here is the reverse concept!

http://www.khanacademy.org/video/basic-subtraction?playlist=Arithmetic

Email me more questions or comments if you have any

Math Level: Grade 3

http://www.khanacademy.org/video/basic-subtraction?playlist=Arithmetic

Email me more questions or comments if you have any

Math Level: Grade 3

### Level 3

Math Level: Grade 2

http://www.khanacademy.org/video/addition-3?playlist=Arithmetic

I appreciate the emails telling me how easy this is, so there is nothing to worry about here either

http://www.khanacademy.org/video/addition-3?playlist=Arithmetic

I appreciate the emails telling me how easy this is, so there is nothing to worry about here either

### Keep it goin

Lets continue

http://www.khanacademy.org/video/level-2-addition?playlist=Arithmetic

Make sure to keep up.

Some people can tell you where they stared having trouble with math. Its not here, so dont worry

http://www.khanacademy.org/video/level-2-addition?playlist=Arithmetic

Make sure to keep up.

Some people can tell you where they stared having trouble with math. Its not here, so dont worry

## Sunday, April 10, 2011

### Indian Contribution

Baudhayana 700 B.C.E.

This is a good book if you are interested in the history of math

Bourbaki, Nicolas (1998),

I am going to continue pointing out the contributions made by certain peoples to mathematics as we go on.

Its good to note that for a civilization to make a contribution to math, it must satisty a number of other requirements first. Among them is not have a starving populace and not be wiped out by war. It is a bad work enviroment

This is a good book if you are interested in the history of math

Bourbaki, Nicolas (1998),

*Elements of the History of Mathematics*, Berlin, Heidelberg, and New York: Springer-Verlag, 301 pages, ISBN 3540647678, http://www.amazon.com/Elements-History-Mathematics-Nicolas-Bourbaki/dp/3540647678/ .I am going to continue pointing out the contributions made by certain peoples to mathematics as we go on.

Its good to note that for a civilization to make a contribution to math, it must satisty a number of other requirements first. Among them is not have a starving populace and not be wiped out by war. It is a bad work enviroment

## Saturday, April 9, 2011

### Lets get it started

What some math looked like at that time.

http://www.khanacademy.org/video/basic-addition?playlist=Arithmetic

This was "math" for the greater part of a millenium, there was simply no need for any of even the most basic functions in math. 1 goat + 1 goat, ok our village has 2 goats.

Math level (American): First grade

Going forward I wont point out that I will be useing the American educational system.

http://www.khanacademy.org/video/basic-addition?playlist=Arithmetic

This was "math" for the greater part of a millenium, there was simply no need for any of even the most basic functions in math. 1 goat + 1 goat, ok our village has 2 goats.

Math level (American): First grade

Going forward I wont point out that I will be useing the American educational system.

### First Prime

Ahmes/Ahmose writes the Rhind Mathematical Papyrus around 1650 BCE in Egypt; the first person in recorded history to have his name tied to mathematics

Note: This blog has been set up to create a near linear explanation of how we can go from simple addition to algebra to the highest levels of math. It was created for a group of a few dozen people who have some interest in math, but I hope to make a few freinds along the way and re-introduce people to math

Note: This blog has been set up to create a near linear explanation of how we can go from simple addition to algebra to the highest levels of math. It was created for a group of a few dozen people who have some interest in math, but I hope to make a few freinds along the way and re-introduce people to math

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