Addition Using Abacus
We will learn addition using Abacus.
We know how to do addition.
For example;
I. Add 11 and 21
Here, we will add the numbers together 11 + 21 = 32
II. Add 17 and 22
Here, we will subtract 17 + 22 = 39
We generally add both the numbers together but, know we will
learn how to add the numbers using abacus.
1. Add 12 and 24 using Abacus.
This abacus is showing the number 12.


This abacus is showing the number 24.


For adding, we count together.
For adding 12 and 24, count ones together and get 6 ones.
Adding tens together, we get 3 tens.
Thus, sum of 12 and 24 becomes 36.
Therefore, 12 + 24 = 36
2. Find the sum of 14 and 15 using Abacus.
This abacus is showing the number 14.


This abacus is showing the number 15.


For adding, we count together.
For adding 14 and 15, count ones together and get 9 ones.
Adding tens together, we get 2 tens.
Thus, sum of 14 and 15 becomes 29.
Therefore, 14 + 15 = 29
3. Add 46 and 31 Using Abacus.
This abacus is showing the number 46.


This abacus is showing the number 31.


For adding, we count together.
For adding 46 and 31, count ones together and get 7 ones.
Adding tens together, we get 7 tens.
Thus, sum of 46 and 31 becomes 77.
Therefore, 46 + 31 = 77
Worksheet on Addition Using Abacus:
1. Add the following using Spike Abacus:
(i) 14 + 13 = _____
(ii) 15 + 23 = _____
(iii) 28 + 31 = _____
(iv) 41 + 35 = _____
(v) 81 + 7 = _____
(vi) 66 + 33 = _____
(vii) 75 + 21 = _____
(viii) 50 + 20 = _____
(ix) 33 + 55 = _____
(x) 24 + 63 = _____
Answer:
1. (i) 27
(ii) 38
(iii) 59
(iv) 76
(v) 88
(vi) 99
(vii) 96
(viii) 70
(ix) 88
(x) 87
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