# Abacus - Addition

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Play Abakus - Addition

Play Abakus - Addition

## Latest events in this game

Learn addition on abacus!

## Description and game instructions

If you do not already know how to use an abacus you are recommended to play the game Abacus - basics. A descriptions of how the abacus is built up and the values of the beads, can also be found there. If you want to practice subtraction on an abacus there's a well suited game for that!#### Difficulties in addition

When you calculate addition on an abacus there are three difficulties you may encounter as described below. There are corresponding levels in the game above, to be able to practice all the difficulties individually or many at the same time.##### Switch five

Carrying five means that there are not enough beads in the lower deck of the rod and you need to switch into a bead with the value of five from the upper deck. The additions you need to remember in these calculations are:4 = 5 - 1 |

3 = 5 - 2 |

2 = 5 - 3 |

1 = 5 - 4 |

##### Switch ten

Carrying ten means that there are not enough beads on that rod. Therefore, a bead from the rod to the left need to be switched. Try to make the switch directly - without switching between the two beads above the beam (which each have the value five). You have to master the following additions to perform a carry with the value of ten:9 = 10 - 1 | 4 = 10 - 6 |

8 = 10 - 2 | 3 = 10 - 7 |

7 = 10 - 3 | 2 = 10 - 8 |

6 = 10 - 4 | 1 = 10 - 9 |

5 = 10 - 5 |

##### Switch both 5 and 10

This means you have to perform both the switched mentioned above. At first it might be difficult to manage the switches and it's really easy to get lost in an exchange. One tip is to remember the initial value the abacus had so that you can start over just from there, without having to restart the entire round.#### Is it possible to cheat with calculating on an abacus?

No, there are no cheating if you want to learn how to use an abacus efficiently. If you are prone to mental arithmetic, you can of course perform the addition in your head and then move the beads to the right positions. But then there is also no point in using the abacus!### Calculation of knowledge points

Each completed level results in 2 knowledge point. The maximum number of points (24 knowledge points) is achieved when you complete all 12 levels. You'll get a bronze medal when you complete a level 2 times and a silver medal after 5 completed rounds. A gold medal will be received after 10 completed rounds. In Abacus - Addition, the maximum number of collectable gold medals is 12. You only earn knowledge points for levels that has not been cleared before. A cleared level has a green background above. Even when you have completed a level, you can continue practicing at that level, but it gives you no more knowledge points.### Similar games

### Game info

(7)

**6 years**and

**15 years**.

By playing the game the student practices

**Logical thinking**,

**Addition**,

**Abacus**.

The game with id

*14*was created by

*Helpfulgames*on 2012-04-20 00:00.

There are a total of

**5**comments on this knowledge games.5 juli 2016 17:48

this game is spectacular it is a fantastic way of learning i have learned more in one day than in 4 days i will continue to play and practice it better.

23 december 2015 17:32

IT WAS SO INTERESTING TO DO ADDITION ON ABACUS AND A VERY EASY WAY TO LEARN ABACUS.

18 december 2014 01:56

I thought this game was great. It is an easy way to learn how to use an abacus.

20 september 2014 17:46

i know the abacus but i did not learn but i know about it

john rey delos santoswrote: