Question

Find the number from each of the following expended forms :

1) $8\times {10}^4+6\times {10}^3+0\times {10}^2+4\times {10}^1+5\times {10}^0$

2) $4\times {10}^5+5\times {10}^3+3\times {10}^2+2\times {10}^0$

3) $3\times {10}^4+7\times {10}^2+5\times {10}^0$

4) $9\times {10}^5+2\times {10}^2+3\times {10}^1$

Answer 1

1)
Given $8\times {10}^4+6\times {10}^3+0\times {10}^2+4\times {10}^1+5\times {10}^0$
$=8\times 10000+6\times 1000+0\times 100+4\times 10+5\times \left(1\right)$ [Since, $a^0=1$]
$=80000+6000+0+40+5$
$=86045$
Therefore, the value of the given expression is $=86045$

2)
Given $4\times {10}^5+5\times {10}^3+3\times {10}^2+2\times {10}^0$
$=4\times 100000+5\times 1000+3\times 100+2\times \left(1\right)$
$=400000+5000+300+2$

$=405302$
Therefore, value of the given expression is $=405302$

3)
Given $3\times {10}^4+7\times {10}^2+5\times {10}^0$
$=3\times 10000+7\times 100+5\times 1$
$=30000+700+5$
$=30705$
Therefore, the value of the given expression is $=30705$

4)
Given $9\times {10}^5+2\times {10}^2+3\times {10}^1$
$=9\times 100000+2\times 100+3\times 10$
$=900000+200+30$
$=900230$
Therefore, the value of the given expression is $=900230$