Calculators

Hit the second button, it allows all the keys on the TI-83 to have a second function.

Now, hit the plus button. There should be a MEM on top of it, this stands for memory.

Now scroll down using the arrow keys to the 7th option, which says reset.

It will confirm that you want to clear the RAM. Then press YES.

Your TI-83 plus is reset.

The first calculator ever made cost about $2500, compared to the $12 it costs now.

i hope this helps you!

An abacus?

The abacus is the first true precursor to the adding machines and computers which would follow. It worked somewhat like this:

The value assigned to each pebble (or bead, shell, or stick) is determined not by its shape but by its position: one pebble on a particular line or one bead on a particular wire has the value of 1; two together have the value of 2. A pebble on the next line, however, might have the value of 10, and a pebble on the third line would have the value of 100. Therefore, three properly placed pebbles--two with values of 1 and one with the value of 10--could signify 12, and the addition of a fourth pebble with the value of 100 could signify 112, using a place-value notational system with multiples of 10.

Thus, the abacus works on the principle of place-value notation: the location of the bead determines its value. In this way, relatively few beads are required to depict large numbers. The beads are counted, or given numerical values, by shifting them in one direction. The values are erased (freeing the counters for reuse) by shifting the beads in the other direction. An abacus is really a memory aid for the user making mental calculations, as opposed to the true mechanical calculating machines which were still to come.

Source: http://www.eingang.org/Lecture/abacus.html

Use the LOG key, divide the result by 3 then use the 10x key.

You can try yourself!

For the Level 4, 10 divided by 2. Clear. 2 times 2 times 2. Clear. 112 divided 2 divided by 2 divided by 2 divided by 2. Clear. 12 divided by 2 divided by 2. Clear. 12 times 12 divided by 2 divded by 2 divided by 2 divided by 2. You WON! I didn't copy and paste this. I figured out myself and I am only 14. For you idiot aldults who are reading this, you don't have a life if you sit at the computer all day and try figure out kids' games.

both can calculate integers in seconds

both can perform easy to use

1. TI-73
2. TI-73 Explorer
3. TI-80
4. TI-81
5. TI-82
6. TI-83
7. TI-83 Plus
8. TI-83 Silver Edition
9. TI-84
10. TI-84 Plus
11. TI-84 Silver Edition
12. TI-85
13. TI-86
14. TI-89
15. TI-89 Titanium
16. TI-92
17. TI-92 II
18. TI-92 Plus
19. Voyage 200
20. TI-Nspire
21. TI-Nspire CAS

You could use it to find the answer to basic mathematical problems. It's like a simple, mechanical calculator.

To scroll, use the up and down arrows. If you want to scroll faster, press 2ND ALPHA and then use the up and down arrows.

The use of slide rules declined quickly after the introduction of inexpensive calculators. By 1976, calculators could be purchased at prices competitive with slide rules, and since their use did not require special training, they were more accurate, and they had greater functionality, it made little sense for most people to get slide rules.

There are still some slide rules being manufactured for special purposes, however. One such is a circular proportional scale used for determining the size to make a copy on a copy machine according to a different size of paper from the original.

Enter the data into 2 lists such as L1 and L2. You do this by going to [STAT] and hit [ENTER] on [EDIT]. After you do this then go turn on diagnostic by going to [2ND] [0] scrolling down to Diagnostic on. Then go back to [STAT], right the right arrow to CALC and scroll down the appropriate regression. Once you have chosen the right regression go to [2ND] [1][,][2ND][2][ENTER] this will give you the equation and coefficient of determination

Yes. For example, if you want to calculate combination(6,2), press 6 and then press MATH. Use the arrow keys to scroll over to PRB at the top and select nCr. Then press 2. You should see:

6 nCr 2

Press ENTER.

Blaise Pascal

Yes, abacuses (or is it abaci?) were used to calculate simple maths problems.

Simple equation:

ECD, ppg = [ (annular pressure, loss, psi ) ÷ (0.052 x TVD, ft) ] + (mud weight, in use, ppg)

Finally completed in 1694 the Leibnitz calculator can add,subtract,multiply, and divide numbers. The stepped drum principle of Gottfried Leibnitz's invention survived for 300 years.

by reading the manual

Just press button shift 7 and On 3 together if u press them screen will become black and when u press shift it gets off. On pressing shift again and again you will see it ends with a digit after which it not works this is original else are fake

The Blaise Pascalâ??s calculator was invented in France during the early 17th century. Its primary usage is to be an adding machine which can be used to add and subtract two numbers. Blaise Pascal invented it with the help of Wilhelm Schickard

Yes. A graphing calculator has lots of options for mathematical calculations, but in addition, it has a relatively large screen, and options to graph functions.

seven (7)

It may depend upon the early civilization referred and their records thereof.

Anyway, here are some of the ancient devices chronologically listed below.

1. pebbles and stones

2. counting boards

3. counting rods

4. abacus

3 simple steps.

i) press square root button

ii) enter the number

iii) hit "="

is it really that hard to figure out?

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For complex numbers, refer to the definition of a complex number (abs(a)*exp(-j*angle(a)))1/2 = sqrt(abs(a))*exp(-j*angle(a)/2). therefore to do this on the casio fx-991ms try the following(assuming the complex number is stored in the ans):

(sqrt(abs ans))[angle symbol]((arg ans)/2)

added by Greg

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Calculate: C = pi times r.