Question

(A) To verify that addition is commutative for whole numbers by paper cutting
and pasting
Let there be any two whole numbers, e.g. 3 and 4.
1. Take a piece of pink graph paper and mark three big squares on it with the help of a
marker as shown in Fig. 1.1. These three squares denote 3 units.​

Answer 1

Answer:

pqr and pr\q এর মধ সমানুপাতি নিনয় করো

Answer 2

Concept:

Addition is a commutative mathematical operation for whole numbers, integers, rational numbers and real numbers.

Given:

Addition is commutative for whole numbers.

Find:

Verify above statement by paper cutting and pasting for 3 and 4.

Solution:

Addition is commutative if for all p and q numbers if p+q = q+p

The given numbers are 3 and 4.

In two columns there are 10 cutted papers. '

For first column, firstly we colored 3 paper cuttings Orange and colored 4 paper cuttings Green.

So total of 7 paper cuttings are colored.

3+4 = 7

In second column , we first colored Green 4 paper cuttings and then orange 3 paper cuttings.

4+3 = 7

Hence, addition is commutative for whole numbers.

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