ABACUS
ABACUS means, calculations using Brain & Fingers..
Use Abacus
This video which was down tells you what is Abacus..
Color full ABACUS
Level 1 in ABACUS Introduction
To learn abacus first we should learn small and big friends.That means it is a part of abacus of basics
There will be a table for small and big friends:-
1.[4-1],2.[3-2],3.[2-3],4.[1-4].these are the small friends because if we add any pair the answer is 5 so we call small friends.
How to use small friends?
To use small friends first the introduction:the small friends are used in abacus on time of adding and lessing in abacus.for Ex:3+2 mean that first you will take 3 and to add 2 the friend of the 2 is 3 so we less 3 and add 5.one more:4+3 mean first you will take 4 and to add 3 the friend of 3 is 2 so we less 2 and add 5.
How to use big friends?
To use big friends first we need the table of big friends:-
1.[1-9],2.[2-8],3.[3-7],4.[4-6],5.[5-5],6.[6-4],7.[7-3],8.[8-2],9.[9-1].
These are the big friends in the abacus because if we add any pair it is 10 so we call them as big friends.
To use big friends for Ex:9+9=first you will take 9 in abacus and to add another 9 the friend of 9 is 1 so you less 1 and add 10.
There will be a table for small and big friends:-
1.[4-1],2.[3-2],3.[2-3],4.[1-4].these are the small friends because if we add any pair the answer is 5 so we call small friends.
How to use small friends?
To use small friends first the introduction:the small friends are used in abacus on time of adding and lessing in abacus.for Ex:3+2 mean that first you will take 3 and to add 2 the friend of the 2 is 3 so we less 3 and add 5.one more:4+3 mean first you will take 4 and to add 3 the friend of 3 is 2 so we less 2 and add 5.
How to use big friends?
To use big friends first we need the table of big friends:-
1.[1-9],2.[2-8],3.[3-7],4.[4-6],5.[5-5],6.[6-4],7.[7-3],8.[8-2],9.[9-1].
These are the big friends in the abacus because if we add any pair it is 10 so we call them as big friends.
To use big friends for Ex:9+9=first you will take 9 in abacus and to add another 9 the friend of 9 is 1 so you less 1 and add 10.
