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Abakus - Addition
Abakus - Addition
Recent activities in this game
Someone got all questions correct at level 1. Addition without switching Ones .
2025-10-22 19:46 after 40 seconds of playing.
Someone had a problem at level 1. Addition without switching Ones .
2025-10-22 19:45 after 44 seconds of playing.
Someone got all questions correct at level 10. Switch both five and ten Ones .
2025-10-22 13:17 after 1 minute of playing.
Someone got all questions correct at level 10. Switch both five and ten Ones .
2025-10-22 13:16 after 1 minute of playing.
Someone got all questions correct at level 10. Switch both five and ten Ones .
2025-10-22 13:14 after 2 minutes of playing.
Someone got all questions correct at level 10. Switch both five and ten Ones .
2025-10-22 13:12 after 2 minutes of playing.
Someone got all questions correct at level 5. Switch five Tens .
2025-10-22 13:11 after 39 seconds of playing.
Someone got all questions correct at level 4. Switch five Ones .
2025-10-22 13:10 after 40 seconds of playing.
Someone got all questions correct at level 1. Addition without switching Ones .
2025-10-22 13:09 after 32 seconds of playing.
Someone had a problem at level 11. Switch both five and ten Tens .
2025-10-22 13:08 after 32 seconds of playing.
Learn addition on abacus!
Description and game instructions
If you're not familiar with how to use an abacus, we recommend trying 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 game level in Abacus - Addition gives 1 knowledge points. You can collect a maximum of 12 knowledge points by completing all 12 levels.
In the game Abacus - Addition, you can earn a total of 36 medals. Medals are awarded based on how many times you have completed a level:
- Bronze medal: after completing 2 rounds.
- Silver medal: after completing 5 rounds.
- Gold medal: after completing 10 rounds.
Knowledge points are only awarded for levels you have not completed before, meaning those that do not yet have checked green circles. Even after completing a level and earning both knowledge points and medals, you can continue practicing it. However, this will not grant any additional knowledge points or medals.
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Comments
There are a total of 10 comments on this knowledge game.
25 April 2021 18:08
N
14 January 2020 18:09
12 November 2019 21:37
S
20 August 2019 16:59
29 January 2018 23:49
J
19 September 2017 15:01
D
5 July 2016 17:48
A
23 December 2015 17:32
E
18 December 2014 01:56
A
20 September 2014 17:46
