GMAT Quantitative Reasoning Practice Test 5

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Question : 40 of 100

Marks: +1, -0

The value of

(9 × 10^{10}) - (2 × 10^5)

is closest to which of the following?

$10^2$
$10^3$
$10^9$
$10^{10}$
$10^{11}$

Solution:

\;9 × 10^{10}=90,000,000,000

\;2 × 10^5=200,000

\;90,000,000,000-200,000=89,999,800,000

\;10^{11}=100,000,000,000

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