Q: What item has beads that slide on rods It can be used to count add subtract multiply and more?

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Well.. the purpose of the slide rule is that, to count, add, subtract, multiply, and divide. For as its structure is like a ruler and has a transparent slider. It is the type of a cursor, used for pointing out the numerals/ numbers. It is the third calculator invented, after Napier's bones. It was invented by Napier, as well.

If you want to use a number line to add and subtract, it can be done with a slide rule. But it is much easier to use an electronic calculator.

You measure its length and with and multiply the two. However, this will take no account of the height: the square footage in which you can stand, crawl or slide.

Multiply the denominator by the whole number, then add the numerator by the answer you got from multiplying. Last, you slide the denominator over.

Please see the related link The abacus is a counting tool, used to help speed up mathematical calculations, and has been in use since ancient times. An abacus consists of beads strung on wires that run across a wooden frame. This device may seem archaic in today's world because the advancement of technology has given us calculators and modern computers but the abacus is still in use today. It is still used by some merchants in Asia and school children in Japan are still taught how to use the abacus as part of their regular curriculum. It can also be used by individuals who are blind and cannot see the display on a calculator. To use an abacus you must first understand its layout. The modern soroban (Japanese abacus) consists of several columns each containing four beads with a crossbar above them containing a single bead that represents five units. The single unit beads are known as earth beads and the beads above the crossbar which represent five units are called heaven beads. The extreme right of the abacus contains the smallest units. For example if you are working with whole numbers only, the value of the beads in right column is one unit. If using decimal places, this row can represent a tenth of a unit, a hundredth, etc. If we assume that the right-most row is a single unit, then the row immediately to the left of it would be tens which is followed by hundreds, thousands, and so on. To represent the number 27 on the abacus you would slide up two earth beads from the ten column, two earth beads from the one column, and finally the heaven bead above the crossbar in the one column. The first step to utilizing the abacus is the clear it out. You do this by sliding all the beads downwards so that none of the beads are raised. You let gravity do the work for you simply by tilting the abacus towards yourself before laying it on a flat surface. Addition and subtraction are very simple operations to perform with an abacus. The most important concept is that when using the abacus you work from left to right. This allows you to easily add and subtract numbers the way they are read. If you wish to perform the calculation 142+156, you would set the abacus to the number 142 then add one bead in the hundreds column, five beads in the tens column and 6 beads in the ones column. When there aren't enough beads in a column to perform the addition or subtraction a system using complementary numbers is implemented. The complementary numbers in respect to 10 are pairs of numbers that equal 10 when added together such as 6 and 4. When doing a problem like 5 + 6 you would set the abacus to 5 but that leaves only 4 beads in the column. Instead of adding 6 you subtract its complement which is four and then you carry the ten. Subtract four beads from the five in the one column and you are left with a single bead. You then add one bead to the ten column and you are left with the answer which is 11 of course. To do subtraction you merely add the complement instead of subtracting it and you would subtract one bead from the tens column instead of adding one. More advanced abacus techniques include multiplication and subtraction. Through practice you can become very efficient with an abacus. Some have even been able to perform calculations with an abacus faster than someone using a modern calculator. This is because of the principle of mechanization. Mechanization means we want to use as little mental power as possible when using the abacus. The purpose is for the human to operate the device and allow the device to do the calculation. In this way, the process of using the abacus requires very little thought from the operator allowing one to use it in a very fast and efficient manner. This makes the abacus a great tool for teaching young children arithmetic. There is also a system of mental arithmetic that utilizes a mental abacus to do calculations. The abacus continues to prove its worth even in the modern world where technology appears to have long surpassed the usefulness of the abacus.

Related questions

Well.. the purpose of the slide rule is that, to count, add, subtract, multiply, and divide. For as its structure is like a ruler and has a transparent slider. It is the type of a cursor, used for pointing out the numerals/ numbers. It is the third calculator invented, after Napier's bones. It was invented by Napier, as well.

I believe they will fit on the bracelet. As long as the clasp of the bracelet can be removed or to be small enough so the beads slide on.

The Chinese abacus.

Well obviously you purchase the charms you want then you get your Brighton charm bracelet and its supposed to have two hooks, one so that you can let the beads and charms slide though and the other to hook your bracelet together. you unhook the one to slide the beads and charms

If you want to use a number line to add and subtract, it can be done with a slide rule. But it is much easier to use an electronic calculator.

No. As a matter of fact, yours is the only one that I know of that will do that.

No an abacus is definitely not a book. It is a piece of maths equipment a child might use to help with their counting, adding, subtracting, division and multiplication. Usually abacuses are made from wood or plastic. You rarely see them around nowadays. Because modern teaching methods involve powerpoints and calculators. We have not much a need for an abacus. Abacus: A wooden (or plastic) frame, with about ten metal (or plastic or etc) tubes running along it, on these tubes are beads. You can slide the beads across, on each tube is ten beads (usually), and sometimes each row different colours. Children learning maths will slide these beads across the tubes one at a time to count or do some sort of maths. Basically it's an instrument used when you've ran out of fingers to count on. Obviously not used so much nowadays. The abacus as first invented in: 2700-2300 BC. So it's an old mathematical instrument that kids used to use to count on. Thanks for reading :) x

Slide count , theme

Yes they do! Biagi bracelets have a smooth 'bump' at the end rather than a screw so beads slide easily over this.

15, you just have to count the number of green things in the picture

repeat sample analysis,check for clots, make a slide of the blood, and examine the slide microscopically if their are clots present then request for a new blood sample.

They are purely decoration, they work OK without them, it's the net and feathers that do the work, the net catches the dreams then they slide down the feathers to the recipient, which is why they are over the sleeping persons head...