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25=20,21,23

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Q: How many three-digit numbers can I make on a abacus from 25 beads?
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What is the difference between abacus and calculator?

The difference is that an abacus uses beads to calculate. A calculater uses solar energy or batteries to make its digital numbers. In other words an abacus uses beads and a calculater uses buttons you press to put numbers on the calculaters screen.


Imagine you have 25 beads you have to make a 3 digit number on an abacus you must use all the beads how many 3 digit numbers can you make?

6 They are 799, 979, 997, 889, 898 & 988


What are the features of the abacus?

it is like the old method of counting it is acquired with beads


What is all about the abacus?

Abacus is one of those devices that are constantly taught to the children for centuries and it seems that its importance may never end in this ever-changing world. Abacus has got the place of great importance in the history of mathematics. One can easily say that the history of mathematics starts with the invention of abacus. Abacus solves the basic arithmetic problems with so much ease and reliability that it is still taught in the various parts of this world in this modern day. Abacus is not like the modern electronic calculators that perform all of the functions of their own and then present the result in an electronic form on their screens. It is rather a tool that helps in counting the numbers with the help of reference in its beads. The beads of the abacus help in remembering the numbers counted and thus make the calculations very easy to perform. This attribute of the abacus has caused it to stand high in the history and made a significant place for it in the lives of people throughout the history.


How do you make an abacus?

To make an abacus, the first thing to do is to make a frame, the wooden edge around an abacus. Then add the separator, the wooden line about 1/3 at the top and 2/3 at the bottom. And then start making the coloum for the beads. Your abacus will then look excactly like this original Chinese abacus picture:Frame: the wooden edges around an abacusSeparator: the wooden line that stretches from the left to the right side of the abacus which separates the top and bottom part of the abacusColoumns: the thin wooden sticks which holds the beadsBeads: The rounded wood for countingBy: ValerieUsername: Valerie_Limasi


How do you solve abacus 6 challenge master 18?

consecutive numbers to make 50


How do you make a spike abacus for school project?

Take a piece of wood and drill 5 holes evenly into the wood. Insert plastic rods into the holes and then place wooden beads over the plastic rods and you will have an easily made spike abacus.


How do the rows of the abacus relate to place value?

they all have valus wether it is numbers that all make up the whole say like they all have value in the numbers like for the abacus five and one have value and in place value it is 6 ones


How many threedigit numbers can you make if the first numbercan be 1234 the second number can be 123456 and the third 012?

The first digit has 4 choices for its digit. The second digit has 6 choices and the third has 3. The solution would simply be 4*6*3=72 three digit numbers.


How was the abacus actually used as a simple calculator?

The Abacus utilizes a combination of two bases (base-2 and base-5) to represent decimal numbers. It is held horizontally with the smaller deck at the top. Each bead on the top deck has the value 5 and each bead on the lower deck has the value 1. The beads are pushed towards the central crossbar to show numbers. Working from right to left, the first vertical line represents units, the next tens, the next hundreds and so on. So for example to show the number 9, on the first line, one heaven bead (top deck) would be moved down (representing 5 units) and 4 earth beads (bottom deck) would be moved up (each representing 4 units). To show the number 79, in addition to the beads in the first line used to make the number 9, one heaven bead would be moved down and two earth beads would be moved up on the second line, representing 5 tens and 2 tens respectively. Addition on the abacus involves registering the numbers on the beads in the straight-forward left-to-right sequence they are written down in. As long as the digits are placed correctly, and the carry


If you have a bag of beads you can make sets of 2 beads 4 beads and 5 beads with no beads left over When you make sets of 9 you have 7 beads left over how many beads do you have?

160 beads can make: 80 sets of 2 ea 40 sets of 4 ea 32 sets of 5 ea or 17 sets of 9 ea with 7 beads left over


How do water beads grow?

well the beads start little. then when you put them in water the beads will upsorb the water and make the bead expand. thats how you make the water beads grow !