Question

The Software Company earned 2,247,852,199 dollars last year. This year they earned 3,000,962,245 dollars. Which is the best estimate of dollars earned last year and this year?A.4,000,000,000B.5,000,000,000C.5,248,814,444D.6,000,000,000

Answer 1

You know the following information:

1. The amount of money (in dollars) earned last year was:

$2,247,852,199$

2. The amount of money (in dollars) earned this year, is:

$3,000,962,245$

Then, to estimate the sum (the total amount of money the Software Company earned in those two years, you can round the numbers to the nearest billion.

Having:

$2,247,852,199$

You need to look at the digit located in the Hundred millions place. Notice that this is:

$2$

Then, since:

$2<5$

You need can't round up. Then:

$2,247,852,199\approx2,000,000,000$

Now, having:

$3,000,962,245$

You can identify that the digit in the Hundred millions place is

$0$

Therefore:

$3,000,962,245\approx3,000,000,000$

Now you can add the numbers rounded:

$2,000,000,000+3,000,000,000=5,000,000,000$

Hence, the answer is: Option B.