Question

$7\times {10}^3+4\times 10+1\times {10}^{-1}+8\times {10}^{-3}$ is the expanded form of the number ____.

• A. $7040.180$
• B. $7040.108$
• C. $7040.018$
• D. $70400.108$

Answer 1

The correct option is B $7040.108$

$7\times {10}^3+4\times 10+1\times {10}^{-1}+8\times {10}^{-3}$
$=7000+40+\frac{1}{10}+\frac{8}{1000}$
$=7000+40+0.1+0.008$
$=7040.108$