Ancient numbersIn ancient times,people wrote numbers in many different ways.However,they nearly all counted in tens.Zero The system of numbers today consists of the numbers from 1 to 9 and 0 (zero).The Indians first invented and developed the 1 to 9

Ancient numbersIn ancient times,people wrote numbers in many different ways.However,they nearly all counted in tens.Zero The system of numbers today consists of the numbers from 1 to 9 and 0 (zero).The Indians first invented and developed the 1 to 9
Ancient numbers
In ancient times,people wrote numbers in many different ways.However,they nearly all counted in tens.
Zero
The system of numbers today consists of the numbers from 1 to 9 and 0 (zero).The Indians first invented and developed the 1 to 9 system of numbers.They then invented the zero.This was a very important invention because it made it easier to write big numbers and to calculate.
Calculating machines
One of the first calculating machines was an abacus.Abacuses are fast and accurate,so people still use them today.On the abacus in the picture,the beads on the wires represent ones,tens,hundreds and thousands starting from the bottom wire.
Now,we use modern calculators.The picture on the right shows a modern calculator.It can add,subtract,multiply and divide.It can also calculate percentages and square roots.
computers are very powerful calculating machines .A computer can do a calculation in a Flash
改写!

Ancient numbersIn ancient times,people wrote numbers in many different ways.However,they nearly all counted in tens.Zero The system of numbers today consists of the numbers from 1 to 9 and 0 (zero).The Indians first invented and developed the 1 to 9
The former people try to use many different ways to record Numbers.
In order to write the greater number of and more complex calculation,Arabic Numbers have been invented,but it was originally Indian invention,they developed system of Numbers 1 to 9,this great invention for human future life provides great convenience.
But only artificial calculation is cannot satisfy the demands of the people,hence,the computing machines began to appear.Initial computational tool is abacus,people but use it more quickly and more accurate calculation,but along with the increase of amount of calculation,people invented more modern computer,it's in a very short time calculation more questions,function more powerful.
We believe,in the near future,calculator will become more and more humanized function more and more powerful.