**Try These (Textbook Page No. 29)**

**Question 1 .**

Find the value of $6+3+8$ and $3+6+8$

(i) Are the same?

(ii) Is there any other way of arranging these three numbers?

Solution:

$6+3+8=3+6+8=17$

(i) Yes, $6+3+8=3+6+8=17$, Both are same

(ii) Yes, we can arrange these numbers as

$3+8+6=8+6+3=8+3+6=6+8+3$

**Question 2 .**

Find the value of $5 \times 2 \times 6$ and $2 \times 5 \times 6$

(i) Are the same?

(ii) Is there any other way of arranging these three numbers?

Solution:

$5 \times 2 \times 6=2 \times 5 \times 6=60$

(i) Yes, they are the same

(ii) They can be arranged as

$2 \times 6 \times 5=6 \times 5 \times 2=5 \times 6 \times 2=6 \times 2 \times 5$.

What is the value of $(15-8)-6 ?$ Is it the same as $15-(8-6) ?$ Why?

(15 $5 \times 8)-6=7-6=1$

**Question 3 .**

Is $7-5$ the same as $5-7 ?$ Why?

Solution:

$7-5 \neq 5-7$.

Because subtraction is not commutative $[\because 7-5=2 ; 5-7=-2]$

**Question $4 .$**

What is the value of $(15-8)-6 ?$ Is it the same as $15-(8-6) ?$ Why?

Solution:

$\begin{aligned}

&(15-8)-6=7-6=1 \\

&(15-8)-6=1

\end{aligned}$

It is not same as $15-(8-6)$.

$15-(8-6)=15-2=13$

$(15-8)-6 \neq 15-(8-6)$