Question

$(2\times {10}^2)+(2\times {10}^{-2})$ is the expanded form of the number ___.

• A. 200.2
• B. 0.22
• C. 20.02
• D. 200.02

Answer 1

The correct option is D 200.02

$(2\times {10}^2)+(2\times {10}^{-2})$
$=200+(2\times \frac{1}{100})(\because a^{-m}=\frac{1}{a^m})$
$=200+0.02$
$=200.02$