Subtraction Using Abacus
We will learn subtraction using Abacus.
We know how to do subtraction.
For example;
I. Subtract 7 from 11
Here, we will subtract 11 – 7 = 4
I. Take away 13 from 34
Here, we will subtract 34 – 13 = 21
We generally subtract one number from the other number but, know we will learn to subtract one number from the other number using abacus.
1. Subtract 51 from 62 using Abacus.
For subtracting, take away one bead of the Ones spike of the first abacus to get ones digit of the difference. (Why?) What is left? It is one.
Again take away five beads of Tens spike of first abacus to get the tens digit at tens place of the difference. It is again one.
Therefore, in the difference we are left with one tens and one ones.
Thus, 62 - 51 = 11
2. Find the difference between 67 and 99 using Abacus.
For subtracting, take away seven beads of the Ones spike of the first abacus to get ones digit of the difference. (Why?) What is left? It is two.
Again take away six beads of Tens spike of first abacus to get the tens digit at tens place of the difference. It is three.
Therefore, in the difference we are left with two tens and three ones.
Therefore, 99 - 67 = 32
3. Subtract 46 from 89 Using Abacus.
For subtracting, take away six beads of the Ones spike of the first abacus to get ones digit of the difference. (Why?) What is left? It is three.
Again take away four beads of Tens spike of first abacus to get the tens digit at tens place of the difference. It is four.
Therefore, in the difference we are left with four tens and three ones.
Therefore, 89 - 46 = 43
Worksheet on Subtraction Using Abacus:
1. Subtract the following using Spike Abacus:
(i) 78 - 56 = _____
(ii) 87 - 36 = _____
(iii) 76 - 0 = _____
(iv) 15 - 15 = _____
(v) 39 - 36 = _____
(vi) 52 - 42 = _____
(vii) 88 - 47 = _____
(viii) 49 - 9 = _____
(ix) 75 - 31 = _____
(x) 62 - 30 = _____
Answer:
1. (i) 22
(ii) 51
(iii) 76
(iv) 0
(v) 3
(vi) 10
(vii) 41
(viii) 40
(ix) 44
(x) 32
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